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J. 112, 48 Radial velocities, spectral types and luminosity classes of 820 stars 10 Johnson H.L. (1950) Astrophys. J. 112, 240 The color-magnitude array for the galactic cluster NGC 2362 11 Morgan W.W., Roman N.G. (1950) Astrophys. J. 112, 362 Revised standards for supergiants on the system of the Yerkes Spectral Atlas 12 Bidelman W.P. (1951) Astrophys. J. 113, 304 Spectral classification of stars listed in Miss Payne's catalogue of C stars 13 Hiltner W.A. (1951) Astrophys. J. 114, 241 Polarization of stellar radiation. III. The polarization of 841 stars 14 Roman N.G. (1951) Astrophys. J. 114, 492 A study of the concentration of early-type stars in Cygnus 15 Ahmad I.I. (1952) Astrophys. J. 115, 341 The intensity of certain lines of HeI in the B stars 16 Nassau J.J., Morgan W.W. (1952) Astrophys. J. 115, 475 A finding list of F stars of high luminosity 17 Roman N.G. (1952) Astrophys. J. 116, 122 The spectra of the bright stars of type F5-K5 18 Sharpless S. (1952) Astrophys. J. 116, 251 A study of the Orion aggregate of early-type stars 19 Weaver H.F. (1952) Astrophys. J. 116, 612 Spectral-type magnitude and color-index relations in the galactic star cluster in Coma Berenices 20 Johnson H.L., Morgan W.W. (1953) Astrophys. J. 117, 313 Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes Spectral Atlas 21 Johnson H.L. (1953) Astrophys. J. 117, 353 Magnitudes colors and spectral types in M39 22 Weaver H.F. (1953) Astrophys. J. 117, 366 Magnitudes, colors and spectral-type relations in the galactic cluster M39 23 Morgan W.W., Whitford A.E., Code A.D. (1953) Astrophys. J. 118, 318 Studies in galactic structure. I. A preliminary determination of the space distribution of the blue giants 24 Morgan W.W., Gonzalez G., Gonzalez G. (1953) Astrophys. J. 118, 323 Blue giants in the neighborhood of NGC 6231 25 Kron G.E., White H.S., Gascoigne S.C.B. (1953) Astrophys. J. 118, 502 Red and infrared magnitudes for 138 stars observed as photometric standards 26 Cox A.N. (1954) Astrophys. J. 119, 188 A study of the galactic cluster NGC 2287 27 Burbidge E.M., Burbidge G.R. (1954) Astrophys. J. 119, 496 Spectrographic observations of emission-line stars 28 Harris III D.L., Morgan W.W., Roman N.G. (1954) Astrophys. J. 119, 622 Photometric ans spectroscopic observations of stars in IC 348 29 Herbig G.H., Spalding J.F. (1955) Astrophys. J. 121, 118 Axial rotation and line broadening in stars of spectral types F0-K5 30 Roman N.G. (1955) Astrophys. J. 121, 454 The spectrum-luminosity diagram for NGC 752 31 Slettebak A. (1955) Astrophys. J. 121, 653 The spectra and rotational velocities of the bright stars of Draper types A3-G0 32 Morris P.M. (1961) Mon. Not. R. Astr. Soc. 122, 325 The Scorpio-Centaurus association. II. Spectral types and luminosities of 200 O, B and A stars 33 Johnson H.L., Morgan W.W. (1955) Astrophys. J. 122, 429 Photometric and spectroscopic observations of the double cluster in Perseus 34 Mendoza E. (1956) Astrophys. J. 123, 54 A spectroscopic study of the Pleiades 35 Stock J. (1952) Astrophys. J. 123, 253 Photoelectric spectrophotometry. I. Hydrogen-line intensities of O-, B-, and A-type stars 36 Hoffleit D. (1956) Astrophys. J. 124, 61 Distance for southern early-type stars specially in Carina and other HII regions 37 Johnson H.L., Sandage A.R., Wahlquist H.D. (1956) Astrophys. J. 124, 81 The galactic cluster M11 38 Hiltner W.A., Johnson H.L. (1956) Astrophys. J. 124, 367 The law of interstellar reddening and absorption 39 Munch G. (1957) Astrophys. J. 125, 42 Interstellar absorption lines in distant stars. I. Nortern Milky Way 40 Walker M.F. (1957) Astrophys. J. 125, 636 Studies of extremely young clusters. II. NGC 6530 41 Strand K.A. (1958) Astrophys. J. 128, 14 Stellar motions in the Orion nebula cluster 42 Kraft R.P. (1958) Astrophys. J. 128, 161 Cepheids in galactic clusters. II. Radial velocity and spectral types in NGC 129 43 Crawford D.L. (1958) Astrophys. J. 128, 185 Two-dimensional spectral classifications by narrow-band photometry for B stars in clusters and associations 44 Babcock H.W. (1958) Astrophys. J. 128, 228 Magnetic fields of the A-type stars 45 Walker M.F. (1960) Astrophys. J. 128, 562 Photoelectric observations of the galactic cluster NGC 6940 46 Hoyle F., Wilson O.C. (1958) Astrophys. J. 128, 604 Some theoretical aspects of H and K emission in late type stars 47 Slettebak A., Nassau J.J. (1959) Astrophys. J. 129, 88 Peculiar and metallic-line A-type stars in a galactic zone 48 Kraft R.P. (1959) Astrophys. J. 129, 287 Eclipsing binaries in galactic clusters and O-B associations 49 Wallerstein G., Helfer H.L. (1959) Astrophys. J. 129, 347 Abundances in G dwarfs stars. I. A comparison of two stars in the Hyades With the Sun 50 Burbidge G.R., Burbidge E.M. (1959) Astrophys. J. 129, 513 Spectra of stars in galactic clusters 51 Osawa K. (1959) Astrophys. J. 130, 159 Spectral classifications of 533 B8-A2 stars and the mean absolute magnitude of A0 V stars 52 Kraft R.P. (1960) Astrophys. J. 131, 330 Color excesses for supergiants and classifical cepheids 53 Herbig G.H. (1960) Astrophys. J. 131, 362 Spectral classifications for 112 variable stars 54 Bless R.G. (1960) Astrophys. J. 132, 532 Photoelectric spectrophotometry of A-type stars 55 Schmalberger D.C. (1960) Astrophys. J. 132, 591 On the location of Beta Cephei stars in the theoretical Hertzsprung-Russell diagram 56 Wampler J., Pesch P., Hiltner W.A., Kraft R.P. (1961) Astrophys. J. 133, 895 Cepheids in galactic clusters. VIII. A reinvestigation of U Sgr in M25 57 Walker M.F. (1961) Astrophys. J. 133, 438 Studies of extremely young clusters. IV. NGC 6611 58 Meadows A.J. (1961) Astrophys. J. 133, 907 Rotational velocities of three metallic-line stars in M39 and the Ursa Major cluster 59 Slettebak A., Bahner K., Stock J. (1961) Astrophys. J. 134, 195 Spectra and colors of the early-type stars near the north galactic pole 60 Pesch P. (1961) Astrophys. J. 134, 602 Photometric and objective prism observations in three galactic clusters 61 Svolopoulos S.N. (1961) Astrophys. J. 134, 612 Spectral classification in some open clusters 62 Yoss K.M. (1961) Astrophys. J. 134, 809 Spectral and luminosity classifications and measurements of the strenght of cyanogen absorption for late-type stars from objective-prism spectra 63 Sandage A.R. (1962) Astrophys. J. 135, 333 Photometric data for the old galactic cluster NGC 188 64 Svolopoulos S.N. (1962) Astrophys. J. 136, 788 Spectral classifications in nine open clusters 65 Johnson H.L. (1962) Astrophys. J. 136, 1135 The galactic cluster NGC 2244 66 Abt H.A., Snowden M.S. (1964) Astrophys. J. 139, 1139 The galactic cluster IC 4665 67 Greenstein J.L., Keenan P.C. (1964) Astrophys. J. 140, 673 A spectroscopic study of NGC 188 68 Morgan W.W., Hiltner W.A. (1965) Astrophys. J. 141, 177 Studies in spectral classification. I. The HR diagram of the Hyades 69 Hiltner W.A., Morgan W.W., Neff J.S. (1965) Astrophys. J. 141, 183 Studies in spectral classification. II. The HR diagram of NGC 6530 70 Schild R.E. (1965) Astrophys. J. 142, 979 Spectral classification in h and chi Persei 71 Cowley A.P. (1965) Astrophys. J. 142, 299 A spectroscopic study of the peculiar binary Boss 1985 72 Kinman T.D. (1965) Astrophys. J. 142, 655 The star cluster NGC 6791 73 Johnson H.M. (1965) Astrophys. J. 142, 964 The spectral and radial velocities of stars in the Orion nebula cluster 74 Morgan W.W., Hiltner W.A., Neff J.S., Garrison R. (1965) Astrophys. J. 142, 974 Studies in spectral classification. III. The H-R diagrams of NGC 2244 and NGC 2264 75 Hiltner W.A., Schild R.E. (1966) Astrophys. J. 143, 770 Spectral classification of Wolf-Rayet stars 76 Abt H.A., Chaffee F.H. (1967) Astrophys. J. 148, 459 Rotational velocities of stars in IC 4665 77 Pesch P. (1967) Astrophys. J. 148, 781 Radial velocities and spectral types of some bright blue stars in the old open cluster M67 78 Kraft R.P. (1967) Astrophys. J. 150, 551 Studies of stellar rotation. V. The dependence of rotation on age among solar-type stars 79 Simonson S. C. (1968) Astrophys. J. 154, 923 A spectroscopic and photometric investigation of the association Cepheus OB2 80 Slettebak A. (1968) Astrophys. J. 154, 933 Stellar rotation and Be stars in the h and chi Persei association 81 Schild R.E., Hiltner W.A., Sanduleak N. (1969) Astrophys. J. 156, 609 A spectroscopic study of the association Scorpius OB1 82 Abt H.A., Jewsburry C.O. (1969) Astrophys. J. 156, 983 Rotational velocities in the open cluster NGC 6475 (M7) 83 Hiltner W.A., Garrison R.F., Schild R.E. (1969) Astrophys. J. 157, 313 MK spectral types for bright southern OB stars 84 Spinrad H., Taylor B.J. (1969) Astrophys. J. 157, 1279 Scanner abundance studies. I. An investigation of supermetallicity in late-type evolved stars 85 Schild R.E. (1970) Astrophys. J. 161, 855 Red supergiants in open clusters 86 Schmitt J.L. (1971) Astrophys. J. 163, 75 Stars with strong cyanogen absorption 87 Schild R.E., Chaffee F.H. (1971) Astrophys. J. 169, 529 Energy distributions and spectra of Orion B stars 88 Conti P.S., Alschuler W.R. (1971) Astrophys. J. 170, 325 Spectroscopic studies of O-type stars. I. Classification and absolute magnitudes 89 Humphreys R.M., Strecker D.W., Ney E.P. (1972) Astrophys. J. 172, 75 Spectroscopic and photometric observations of M supergiants in Carina 90 Herbig G.H. (1972) Astrophys. J. 174, L89 A highly reddened star near NGC 6231 91 Abt H.A., Morgan W.W. (1972) Astrophys. J. 174, L131 The HR diagram of the open cluster IC 2602 92 Walker M.F. (1972) Astrophys. J. 175, 89 Studies of extremely young clusters. VI. Spectroscopic observations of the ultraviolet-excess stars in the Orion nebula cluster and NGC 2264 93 Molnar M.R. (1972) Astrophys. J. 175, 453 The helium-weak stars 94 Smith M.A. (1972) Astrophys. J. 175, 765 Metallicism in border regions of the Am domain. I. Extremeley young Am stars in the Orion 1c association 95 Garrison R.F. (1972) Astrophys. J. 177, 653 Some characteristics of the moderately old open cluster NGC 752 96 Conti P.S. (1973) Astrophys. J. 179, 161 Spectroscopic studies of O-type stars. II. Comparison with non-LTE models 97 Young A., Martin A.E. (1973) Astrophys. J. 181, 805 A search for Ap stars in open clusters 98 Conti P.S., Leep E.M. (1974) Astrophys. J. 193, 113 Spectroscopic observations of O-type stars. V. The hydrogen lines and lambda 4686 He II 99 White S.D.M. (1975) Astrophys. J. 197, 67 UBV photometry of NGC 2439 100 Imhoff C.L., Keenan P.C. (1976) Astrophys. J. 205, 455 The luminosity of the very red supergiant near the cluster Tr 27 101 Hartoog M.R. (1976) Astrophys. J. 205, 807 The frequency of peculiar A and metallic-line stars in open clusters 102 Herbst W. (1976) Astrophys. J. 208, 923 On the extinction law in the Carina nebula 103 Turner G.D. (1976) Astrophys. J. 210, 65 The value of R in Monoceros 104 Davis R.J. (1977) Astrophys. J. 213, 105 Spectral classification and U, B, V, Hbeta photometry 105 Conti P.S., Ebbets O. (1977) Astrophys. J. 213, 438 Spectroscopic studies of O-type stars. VII. Rotational velocities Vsini and evidence for macroturbulent motions 106 Moffat A.F.J., FitzGerald M.P., Jackson P.D. (1977) Astrophys. J. 215, 106 Trumpler 27: a heavily reddened young open cluster with blue and red supergiants 107 Leung K.C., Moffat A.F.J., Seggewiss W. (1979) Astrophys. J. 231, 742 The massive multiple system HD 93206 (QZ Carinae) in the great Carina nebula 108 Walker M.F. (1983) Astrophys. J. 271, 642 Studies of extremely young clusters. VII. Spectroscopic observations of faint stars in the Orion nebula 109 Abt H.A., Cardona O. (1983) Astrophys. J. 272, 182 Confirmations among visual multiples of an increase of Ap stars with age 110 Abt H.A., Cardona O. (1984) Astrophys. J. 276, 266 The nature of the visual companions of Ap and Am stars 111 Abt H.A., Cardona O. (1984) Astrophys. J. 285, 190 Be stars in binaries 112 Turner D.G. (1985) Astrophys. J. 292, 148 The young open cluster Stock 16: An example of star formation in an elephant trunk 113 Abt H.A. (1988) Astrophys. J. 331, 922 Maximum separations among cataloged binaries 115 Duncan D.K. (1993) Astrophys. J. 406, 172 Rotation of young solar-type stars in the Orion nebula region 116 Lee T.A. (1970) Astrophys. J. 162, 217 Photometry of high-luminosity M-type stars 117 Stock J. (1956) Astrophys. J. 123, 258 Magnitudes and colors for stars in two new galactic clusters 118 Fawley W.M., Cohen M. (1974) Astrophys. J. 193, 367 The open cluster NGC 7419 and its M7 supergiant IRC +60375 119 Blanco V., Nassau J.J., Stock J., Wehlau W. (1955) Astrophys. J. 121, 637 M-type stars in NGC 7419 120 Massey P., Johnson K.E., DeGioia-Eastwood K. (1995) Astrophys. J. 454, 151 The initial mass function and massive star evolution in the OB associations of northern Milky Way 121 Herbig G.H., Terndrup D.M. (1986) Astrophys. J. 307, 609 The Trapezium cluster of the Orion nebula 122 Abt H.A. (1986) Astrophys. J. 304, 688 The ages and dimensions of Trapezium systems 201 Bidelman W.P. (1954) Astrophys. J. Suppl. 1, 175 Catalogue and bibliography of emission-line stars of types earlier than B. 202 Morgan W.W., Code A.D., Whitford A.E. (1955) Astrophys. J. Suppl. 2, 41 Studies in galactic structure. II. Luminosity classification for 1270 blue giant stars 203 Farnsworth A.H. (1955) Astrophys. J. Suppl. 2, 123 Stellar spectra and colors in Milky Way regions in Cassiopeia 204 Roman N.G. (1955) Astrophys. J. Suppl. 2, 195 A catalogue of high-velocity stars 205 Walker M.F. (1956) Astrophys. J. Suppl. 2, 365 Studies of extremely young clusters. I. NGC 2264 206 Hiltner W.A. (1956) Astrophys. J. Suppl. 2, 389 Photometric, polarization and spectrographic observations of O and B stars 207 Hoag A.A., Applequist L. (1965) Astrophys. J. Suppl. 12, 215 Distance moduli of open clusters 208 Lesh J.R. (1968) Astrophys. J. Suppl. 17, 371 The kinematics of the Gould Belt: An expanding group? 209 don Barry C. (1970) Astrophys. J. Suppl. 19, 281 Spectral classification of A and F stars 210 Bond H.E. (1970) Astrophys. J. Suppl. 22, 117 A search for metal-deficient stars 211 Walborn N.R. (1971) Astrophys. J. Suppl. 23, 257 Some spectroscopic characteristics of the OB stars: An investigation of the space distribution of certain OB stars and the reference frame of the classification 212 Harris G.L.H. (1976) Astrophys. J. Suppl. 30, 451 Evolved stars in open clusters 213 Garrison R.F., Hiltner W.A., Schild R.E. (1977) Astrophys. J. Suppl. 35, 111 MK spectral classifications for southern OB stars 214 Keenan P.C., Pitts R.E. (1980) Astrophys. J. Suppl. 42, 541 Revised MK spectral types for G, K, and M stars 215 Abt H.A. (1981) Astrophys. J. Suppl. 45, 437 Visual multiple. VII. MK classifications 216 Slettebak A. (1982) Astrophys. J. Suppl. 50, 55 Spectral types and rotational velocities of the brighter Be stars and A-F type shell stars 217 Gray R.O., Garrison R.F. (1987) Astrophys. J. Suppl. 65, 581 The early A type stars: refined MK classification, confrontation with Stroemgren photometry, and the effects of rotation 218 Walborn N.R. (1973) Astrophys. J. 179, 517 Some characteristics of the Eta Carinae complex 219 Gray R.O., Garrison R.F. (1989) Astrophys. J. Suppl. 69, 301 The early F-type stars: refined classification, confrontation with Stroemgren photometry, and the effects of rotation 220 Gray R.O., Garrison R.F. (1989) Astrophys. J. Suppl. 70, 623 The late A-type stars: refined MK classification, confrontation with Stroemgren photometry, and the effects of rotation 221 Sowell J.R (1987) Astrophys. J. Suppl. 64, 241 Yellow evolved stars in open clusters 222 Abt H.A., Morrell N.I. (1995) Astrophys. J. Suppl. 99, 135 The relation between rotational velocities and spectral peculiarities among A-type stars 251 Pearce J.A. (1948) Astron. J. 54, 135 HD 215835 - a new massive eclipsing binary 252 Weaver H.F. (1953) Astron. J. 58, 177 B stars and spiral structure in the larger neighborhood of the Sun 253 Popper D.M. (1954) Astron. J. 59, 445 Spectral types of some of thge brighter stars in the cluster M67 254 Eggen O.J. (1957) Astron. J. 62, 45 Distribution of the nearer bright stars in the color-luminosity array 255 Tifft W.G. (1958) Astron. J. 63, 127 A system of three-color photometry with application to galactic structure in Cygnus 256 Upgren A.R. (1962) Astron. J. 67, 37 The space distribution of late-type stars in a north galactic pole region 257 Roberts M.S. (1962) Astron. J. 67, 79 The galactic distribution of the Wolf-Rayet stars 258 Slettebak A., Wright R.R., Graham J.A. (1968) Astron. J. 73, 152 Spectra and colors of A-type stars in a north galactic pole region 259 Racine R. (1968) Astron. J. 73, 233 Stars in reflection nebulae 260 Abt H.A., Morgan W.W. (1969) Astron. J. 74, 813 The H-R diagram of NGC 2516 261 Cowley A.P., Cowley C., Jaschek M., Jaschek C. (1969) Astron. J. 74, 375 A study of the bright A stars. I. A catalogue of spectral classifications 262 Perry C.L., Hill G. (1969) Astron. J. 74, 899 Photometric studies of southern galactic clusters. I. IC 2391 263 Harlan E.A. (1969) Astron. J. 74, 916 MK classification for F- and G-type stars. I 264 Murphy R.E. (1969) Astron. J. 74,1082 A spectroscopic investigation of visual binaries with B-type primaries 265 Hiltner W.A., Morgan W.W. (1969) Astron. J. 74, 1152 UBV photometry and spectral types in NGC 6611 266 Harlan E.A., Taylor B.J. (1970) Astron. J. 75, 165 MK classifications for F- and G-type stars. II 267 Wooden II, W.H. (1970) Astron. J. 75, 324 UBV photoelectric photometry in four southern Milky Way fields 268 Humphreys R.M. (1970) Astron. J. 75, 602 The space distribution and kinematics of supergiants 269 Graham J.A. (1970) Astron. J. 75, 703 The space distribution of the OB stars in Carina 270 Hill G., Barnes J.V. (1971) Astron. J. 76, 110 A spectroscopic and photometric study of NGC 7243 271 Schild R.E., Neugebauer G., Westphal J.A. (1971) Astron. J. 76, 237 Interstellar absorption and color excesses in Sco OB-1 272 Morgan W.W., Hiltner W.A., Garrison R. (1971) Astron. J. 76, 242 The H-R diagram of the Alpha Persei cluster 273 Crampton D. (1971) Astron. J. 76, 260 Observations of stars in HII regions: Spectral classification and UBV photometry 274 Morgan W.W., Abt H.A. (1972) Astron. J. 77, 35 The spectral classification of the F stars of intermediate luminosity 275 Walborn N.R. (1972) Astron. J. 77, 312 Spectral classification of OB stars in both hemisphere and the absolute-magnitude calibration 276 Upgren A.R., Grossenbacher R., Penhallow S.W., MacConnell D.J., Frye R.L. (1972) Astron. J. 77, 486 Dwarf K and M stars in the southern hemisphere 277 Sturch C.R., Sharpless S. (1972) Astron. J. 77, 669 Spectra of Upgren's unclassified stars 278 Cowley A.P. (1972) Astron. J. 77, 750 Spectral classification of the bright B8 stars 279 Schild R.E. (1973) Astron. J. 78, 37 Spectral types and UBV photometry of G-K giants at the north galactic pole 280 Abt H.A., Morgan W.W. (1973) Astron. J. 78, 386 On the metallicity of the main-sequence stars in M67 281 Walborn N.R. (1973) Astron. J. 78, 1067 The space distribution of the O stars in the solar neighborhood 282 McCuskey S.W. (1974) Astron. J. 79, 107 The space density of A stars in a region in Cassiopeia 283 Pesch P., McCuskey S.W. (1974) Astron. J. 79, 116 An A-star concentration in Cassiopeia 284 McCuskey S.W., Pesch P., Snyder G.A. (1974) Astron. J. 79, 597 The space distribution and radial velocities of some early-type stars in the Perseus spiral arm 285 Harlan E.A. (1974) Astron. J. 79, 682 MK classifications for F- and G-type stars. III. 286 Levato H., Malaroda S. (1974) Astron. J. 79, 890 Spectroscopic study of the open cluster NGC 2232 287 Claria J.J. (1974) Astron. J. 79, 1022 Investigation of Milky Way region in Canis Major 288 Dworetsky M.M. (1975) Astron. J. 80, 131 Spectroscopic study of the open cluster NGC 2422 289 Herbst W. (1975) Astron. J. 80, 212 R associations I. UBV photometry and MK spectroscopy of stars in southern reflection nebulae 290 Malaroda S. (1975) Astron. J. 80, 637 Study of the F-type stars I. MK spectral types 291 Levato H., Malaroda S. (1975) Astron. J. 80, 807 NGC 3114: another open cluster possibly rich in peculiar stars 292 McConnell D.J., Bidelman W.P. (1976) Astron. J. 81, 225 Finding list and spectral classifications for southern luminous stars 293 Edwards T.W. (1976) Astron. J. 81, 245 MK classification for visual binary components 294 Bolton C.T., Herbst W. (1976) Astron. J. 81, 339 Photometry of stars near 3U1700-37=HD 153919 and 3U0900-40=HD 77581 295 McNamara B.J. (1976) Astron. J. 81, 845 Pre-main-sequence masses and the age spread in the Orion cluster 296 Turner D.G. (1976) Astron. J. 81, 1125 New determinations of R in open clusters 297 Lutz T.E., Lutz J.H. (1977) Astron. J. 82, 431 Spectral classification and UBV photometry of visual double stars 298 Guetter H.H. (1977) Astron. J. 82, 598 Spectroscopic studies of stars in Per OB2 299 Turner D.G. (1978) Astron. J. 83, 1081 The value of R in IC 2581 300 Garrison R.F., Schild R.E. (1979) Astron. J. 84, 1020 The main sequence of NGC 6231 301 Feinstein A., FitzGerald M.P., Moffat A.F.J. (1980) Astron. J. 85, 708 The young open cluster Trumpler 15 in the Eta Carinae complex 302 Forte J.C., Orsatti A.M. (1981) Astron. J. 86, 209 OB stars in the field of the Carina nebula 303 Walborn N.R. (1982) Astron. J. 87, 1300 Two-dimensional spectral classification for O stars in the southern Milky Way 304 Corbally C.J., Garrison R.F. (1986) Astron. J. 92, 90 MK spectral classifications for 30 faint stars in Praesepe 305 van Altena W.F., Lee J.T., Lee J.-F., Lu P.K., Upgren A.R. (1988) Astron. J. 95, 1744 The velocity dispersion of the Orion nebula cluster. I. 306 Guetter H.H., Vrba F.J. (1989) Astron. J. 98, 611 Reddening and polarimetric studies toward IC 1805 307 FitzGerald M.P., Harris G.L.H., Cameron Reed B. (1990) Astron. J. 102, 865 The moderately young open cluster NGC 2353 308 Landolt A.U., Perry C.L., Levato O.H., Malaroda S.M. (1990) Astron. J. 100, 695 Multicolor photometric and spectroscopic observations of the van den Bergh and Hagen cluster no 99 309 Lattanzi M.G., Massone G., Munari U. (1991) Astron. J. 102, 177 Memberships and CM diagrams of young open clusters: I. NGC 225 310 Castelaz M.W., Persinger T., Stein J.W., Prosser J., Powell H.D. (1991) Astron. J. 102, 2103 Photometry of astrometric reference stars 311 Forbes D., English D., de Robertis M.M., Dawson P.C. (1992) Astron. J. 103, 916 Membership of the WR binary system V444 Cygni in the young open cluster Berkeley 86 313 Turner D.G., Forbes D., Pedreros M. (1992) Astron. J. 104, 1132 Galactic clusters with asociated cepheid variables. II. NGC 129 and DL Cassiopeiae 314 Massey P., Johnson J. (1993) Astron. J. 105, 980 Massive stars near Eta Carinae: the stellar content of Tr 14 and Tr 16 315 Harris G.L.H., FitzGerald M.P.V., Mehta S., Reed B.C. (1993) Astron. J. 106, 1533 NGC 2287: an important intermediate-age open cluster 316 Turner D.G., Mandushev G.I., Forbes D. (1994) Astron. J. 107, 1796 Galactic clusters with associated cepheid variables. IV. C2128+488 (Anon. Platais) and V1726 Cygni 317 Saurer W., Seeberger R., Weinberger R. (1994) Astron. J. 107, 2101 Berkeley 93: a distant star cluster nestled in a dust cloud 318 Hillenbrand L. A., Massey P., Strom S.E., Merrill K.M. (1993) Astron. J. 106, 1906 NGC 6611: a cluster caught in the act 319 Bryja C., Humphreys R.M., Jones T.J. (1994) Astron. J. 107, 246 The lowest mass stars in the Hyades 320 Sears R.L., Sowell J.R. (1997) Astron. J. 113, 1039 Spectral classification of "photometric subgiants" in open clusters 321 Guetter H.H., Turner D.G. (1997) Astron. J. 113, 2116 IC 1590, a young cluster embedded in the nebulosity of NGC 281 381 Rebeirot E. (1970) Astron. Astrophys. 4, 404 Vitesses radiales dans la region de l'amas NGC 752 382 Conti P.S., van den Heuvel E.P.J. (1970) Astron. Astrophys. 9, 466 On the presence of metallic line stars in young clusters: M7 and NGC 7160 383 Lindoff U. (1971) Astron. Astrophys. 15, 439 The open clusters NGC 6613 (M18) and NGC 6716 384 Bernacca P.L., Ciatti F. (1972) Astron. Astrophys. 19, 482 A search for He-weak stars in very young clusters 385 Dachs J. (1972) Astron. Astrophys. 21, 373 A spectroscopic study of the peculiar stars in the open cluster NGC 2516 386 Lesh J.R., Aizenmann M.L. (1973) Astron. Astrophys. 22, 229 The spectral classification of the Beta Cephei stars and their location in the theoretical Hertzsprung-Russell diagram 387 Georgelin Y.M., Georgelin Y.P., Roux S. (1973) Astron. Astrophys. 25, 337 Observations de nouvelles regions HII galactiques et d'etoiles excitatrices 388 Grasdalen G.L., Carrasco L. (1975) Astron. Astrophys. 43, 259 NGC 2175: The cluster age and the nature of the nebulosity surrounding S252a 389 van Rensbergen W., Hammerschlag G., van den Heuvel E.P.J (1978) Astron. Astrophys. 64, 131 Spectroscopic studies of open clusters - A search for Ap stars 390 The P.S., Tjin a Djie H.R.E., Wamstecker W. (1980) Astron. Astrophys. 84, 263 Tr27-28: A WC9-type stars with large infrared excess 391 Moffat A.F.J. (1983) Astron. Astrophys. 124, 273 The bright stellar content of the giant galactic HII region NGC 3603 392 The P.S., Hageman T., Westerlund B.E., Tjin a Djie H.R.E. (1985) Astron. Astrophys. 151, 391 The spectral energy distribution of stars above the ZAMS in the central part of the open cluster NGC 6383 393 Havlen R.J., Moffat A.F.J. (1977) Astron. Astrophys. 58, 351 A new cluster containing 2 Wolf-Rayet stars and 2 Of stars 394 Fitzgerald M.P., Hurkens R., Moffat A.F.J. (1976) Astron. Astrophys. 46, 287 Bochum 15, a new yound stellar aggregate in Puppis 395 Jackson P.D., Fitzgerald M.P., Moffat A.F.J. (1977) Astron. Astrophys. 60, 417 Photoelectric and spectroscopic observations of Bochum 15 411 Lindoff U. (1972) Astron. Astrophys. Suppl. 7, 231 An investigation of four southern open clusters 412 Humphreys R.M. (1973) Astron. Astrophys. Suppl. 9, 85 Spectroscopic and photometric observations of luminous stars in Carina-Centaurus (l = 282d - 305d) 413 Lindoff U. (1973) Astron. Astrophys. Suppl. 9, 229 The open cluster NGC 2527 414 Barbon R., Hassan S.M. (1973) Astron. Astrophys. Suppl. 10, 1 A study of the open cluster NGC 1778 415 Moffat A.F.J. (1974) Astron. Astrophys. Suppl. 16, 33 NGC 2345, a moderately young open cluster in Canis Major 416 Thackeray A.D., Andrews P.J. (1974) Astron. Astrophys. Suppl. 16, 323 A supplementary list of southern O stars 417 Moffat A.F.J., FitzGerald M.P. (1974) Astron. Astrophys. Suppl. 18, 19 NGC 2453, a moderately young open cluster in Puppis 418 Levato H. (1975) Astron. Astrophys. Suppl. 19, 91 Rotational velocities and spectral types for a sample of binary systems 419 Humphreys R.M. (1975) Astron. Astrophys. Suppl. 19, 243 Spectroscopic and photometric observations of luminous stars in the Centaurus-Norma (l = 305d -340d) section of the Milky Way 420 FitzGerald M.P., Moffat A.F.J. (1975) Astron. Astrophys. Suppl. 20, 289 On the nature of the Puppis cluster NGC 2483 421 Floquet M. (1975) Astron. Astrophys. Suppl. 21, 25 Classification spectrale d'etoiles Ap et Am 422 Blaauw A., Tolbert C.R., West R.M., Bartaya R.A. (1976) Astron. Astrophys. Suppl. 23, 393 Space distribution and kinematics of intermediate population II stars. Part I photometry and spectroscopy in selected McCormick proper motion fields 423 Ardeberg A., Maurice E. (1977) Astron. Astrophys. Suppl. 28, 153 A spectrographic and photometric study of stars and interstellar medium surrounding HD 101205 424 Andersen J., Nordstrom B. (1977) Astron. Astrophys. Suppl. 29, 309 Bright southern stars of astrophysical interest 425 FitzGerald M.P., Luiken M., Maitzen H.M., Moffat A.F.J. (1979) Astron. Astrophys. Suppl. 37, 345 Analysis of the results of MK classification of 176 stars in 37 southern open clusters 426 Drilling J.S., Perry C.L. (1981) Astron. Astrophys. Suppl. 45, 439 Spectral types and radial velocities of southern OB+ stars 427 Jensen K.S. (1981) Astron. Astrophys. Suppl. 45, 455 Spectral classification in the MK system of 167 northern HD stars 428 Breger M. (1984) Astron. Astrophys. Suppl. 57, 217 Spectral classification and photometry of selected Pleiades stars 429 Dachs J., Kabus H. (1988) Astron. Astrophys. Suppl. 78, 25 UBV photometry and the structure of the galactic cluster NGC 2516 430 Perry C.L., Hill G., Younger P.F., Barnes J.V. (1990) Astron. Astrophys. Suppl. 86, 415 A study of Sco OB1 and NGC 6231. I. New observational data 431 Sagar R., Sharples R.M. (1991) Astron. Astrophys. Suppl. 88, 47 Fibre spectroscopy and BV CCD photometry of the southern open cluster NGC 3114 432 Turner D.G. (1993) Astron. Astrophys. Suppl. 97, 755 A detailed study of the sparse open cluster Roslund 3: a case for circumstellar extinction 433 Westerlund B.E. (1987) Astron. Astrophys. Suppl. 70, 131 Photometry and spectroscopy of stars in the region of a highly reddened cluster in Ara 434 Fitzgerald M.P., Boudreault R., Fich M., Luiken M., Witt A.N. (1979) Astron. Astrophys. Suppl. 37, 351 The open clusters Pismis 6 and 8, and Wat 6 435 Moffat A.F.J., Fitzgerald M.P., Jackson P.D. (1979) Astron. Astrophys. Suppl. 38, 197 The rotation and structure of the Galaxy beyond the solar circle. I. Photometry and spectroscopy of 276 stars in 45 HII regions and other young stellar groups toward the galactic anticenter 461 Feast M.W. (1957) Mon. Not. R. Astr. Soc. 117, 193 Radial velocities and spectral types in the galactic clusters M25 and NGC 6087 462 de Vaucouleurs A. (1957) Mon. Not. R. Astr. Soc. 117, 449 Spectral types and luminosities of B, A and F southern stars 463 Evans D.L., Menzies A., Stoy R.H. (1957) Mon. Not. R. Astr. Soc. 117, 534 Fundamental data for southern stars (First list) 464 Feast M.W. (1958) Mon. Not. R. Astr. Soc. 118, 618 Spectral types and radial velocities in the galactic cluster NGC 3293 465 Evans D.S., Menzies A., Stoy R.H. (1959) Mon. Not. R. Astr. Soc. 119, 638 Fundamental data for southern stars (Second list) 466 Griffin R.F., Redman R.O. (1960) Mon. Not. R. Astr. Soc. 120, 287 Photoelectric measurements of the lambda 4200A CN band in G8-K5 spectra 467 Deeming T.J. (1960) Mon. Not. R. Astr. Soc. 121, 52 The magnesium b lines in late-type stars 468 Feast M.W., Stoy R.H., Thackeray A.D., Wesselink A.J. (1961) Mon. Not. R. Astr. Soc. 122, 239 Spectral classification and photometry of southern B stars 469 Morris P.M. (1961) Mon. Not. R. Astr. Soc. 122, 325 Centaurus association. II. Spectral types and luminosities of 220 O,B and A stars 470 Whiteoak J.B. (1961) Mon. Not. R. Astr. Soc. 123, 245 A study of galactic cluster IC 2602 471 Bappu M.K.V., Chandra S., Sanwal N.B., Sinvhal S.D. (1962) Mon. Not. R. Astr. Soc. 123, 521 Photoelectric measures of hydrogen-line absorption in early-type stars 472 Thackeray A.D., Wesselink A.J., Harding G.A. (1962) Mon. Not. R. Astr. Soc. 124, 445 The cluster NGC 6067 473 Whiteoak J.B. (1963) Mon. Not. R. Astr. Soc. 125, 105 An association of O and B stars in Ara 474 Feast M.W. (1963) Mon. Not. R. Astr. Soc. 126, 11 The galactic cluster NGC 4755 (Kappa Crucis) 475 Buscombe W. (1965) Mon. Not. R. Astr. Soc. 129, 411 Stellar spectra in galactic cluster IC 2391 476 Thackeray A.D., Wesselink A.J. (1965) Mon. Not. R. Astr. Soc. 131, 121 A photometric and spectroscopic study of the cluster IC 2944 477 Buscombe W., Kennedy P.M. (1968) Mon. Not. R. Astr. Soc. 139, 215 Stellar spectra in the cluster Messier 7 478 Buscombe W. (1969) Mon. Not. R. Astr. Soc. 144, 31 Line strengths for southern OB stars - II 479 Evans T.L. (1969) Mon. Not. R. Astr. Soc. 146, 101 The open cluster IC 2581 480 Wesselink A.J. (1969) Mon. Not. R. Astr. Soc. 146, 329 Photometry of NGC 4103 481 Penston M.V., Hunter J.K., O'Neill A. (1975) Mon. Not. R. Astr. Soc. 171, 219 Further observations of the Orion nebula cluster 482 FitzGerald M.P., Harris G.L.H., Miller M. (1980) Mon. Not. R. Astr. Soc. 191, 95 A spectroscopic and statistical study of Collinder 140 521 Greenstein J.L., Struve O. (1946) Publ. Astr. Soc. Pacific 58, 366 Spectra of variable stars in the Orion nebula 522 Wilson O.C. (1948) Publ. Astr. Soc. Pacific 60, 383 Variations in the spectrum of the Wolf-Rayet star HD 50896 523 McNamara D.H. (1953) Publ. Astr. Soc. Pacific 65, 286 Periods and absolute magnitudes of the beta Canis Majoris stars 524 Bidelman W.P. (1954) Publ. Astr. Soc. Pacific 66, 249 Spectral classification of southern stars of high luminosity 525 Struve O. (1955) Publ. Astr. Soc. Pacific 67, 135 An interesting group of pulsating stars 526 Bidelman W.P. (1956) Publ. Astr. Soc. Pacific 68, 318 Spectral classification of the brighter stars of the Praesepe cluster 527 Bidelman W.P. (1957) Publ. Astr. Soc. Pacific 69, 147 Spectral classification of stars noted on Case objective-prism plates. I. 528 Wallerstein G. (1957) Publ. Astr. Soc. Pacific 69, 172 The absolute magnitude of U Sagitarii and its membership in M25 529 Bidelman W.P. (1957) Publ. Astr. Soc. Pacific 69, 326 Spectral classification of stars noted on Case objective-prism plates. II. 530 Bidelman W.P. (1957) Publ. Astr. Soc. Pacific 69, 573 Spectral classification of nine stars 531 Hoag A.A., Smith E.V.P. (1959) Publ. Astr. Soc. Pacific 71, 32 Polarization in NGC 2244 532 Walker M.F., Bidelman W.P. (1960) Publ. Astr. Soc. Pacific 72, 50 The reddest giants in M11 and NGC 7789 533 Roslund C. (1960) Publ. Astr. Soc. Pacific 72, 205 Remarks on some new and some known galactic clusters 534 Hernandez C. (1960) Publ. Astr. Soc. Pacific 72, 416 Spectroscopic observations of stars of the Kappa Crucis cluster 535 Jaschek M., Jaschek C. (1960) Publ. Astr. Soc. Pacific 72, 500 Southern stars with abnormal spectra 536 Feinstein A. (1961) Publ. Astr. Soc. Pacific 73, 410 The southern galactic cluster IC 2391 537 Feinstein A. (1961) Publ. Astr. Soc. Pacific 73, 452 Spectroscopic observations of M7 538 Hoag A.A., Smith E.P. (1963) Publ. Astr. Soc. Pacific 75, 32 539 Cowley A.P., Cowley C.R. (1965) Publ. Astr. Soc. Pacific 77, 184 Slit spectra of some peculiar and metallic-line A stars 540 Feinstein A. (1966) Publ. Astr. Soc. Pacific 78, 301 The open cluster NGC 2451 541 Bidelman W.P., Victor R.C. (1966) Publ. Astr. Soc. Pacific 78, 550 Twenty-three stars with peculiar spectra 542 Appenzeller I. (1967) Publ. Astr. Soc. Pacific 79, 102 MK spectral types for 185 bright stars 543 Guetter H.H. (1968) Publ. Astr. Soc. Pacific 80, 197 Spectral classifications of 239 early-type stars 544 Perry C.L., Bond H.E. (1969) Publ. Astr. Soc. Pacific 81, 629 Spectrocopic studies of southern galactic clusters. I. IC 2391 545 Christy J.W., Walker R.L.jr (1969) Publ. Astr. Soc. Pacific 81, 643 MK classification of 142 visual binaries 546 Ianna P. (1970) Publ. Astr. Soc. Pacific 82, 825 Spectroscopy of stars in the galactic cluster NGC 1039 (M34) 547 Frye R.L., McConnell D.J., Humphreys R.M. (1970) Publ. Astr. Soc. Pacific 82, 1360 New Ap stars in NGC 3114 548 Cowley A.P., Crawford D.L. (1971) Publ. Astr. Soc. Pacific 83, 296 Classification of some bright stars with unusual spectra 549 Bond H.E., Perry C.L. (1971) Publ. Astr. Soc. Pacific 83, 643 Radial velocities and spectral classification of A-type stars near the south galactic pole 550 Levato H. (1972) Publ. Astr. Soc. Pacific 84, 584 Rotational velocities and spectral types of some A-type stars 551 Weaver W.M.B., Naftilan S.A. (1973) Publ. Astr. Soc. Pacific 85, 213 Two flare stars behind the Pleiades 552 Malaroda S. (1973) Publ. Astr. Soc. Pacific 85, 328 Classification of some bright F-type stars with unusual spectra 553 Cowley A.P., Fraquelli D. (1974) Publ. Astr. Soc. Pacific 86, 70 MK spectral types for some bright F stars 554 Levato H., Malaroda S. (1975) Publ. Astr. Soc. Pacific 87, 173 Spectral types in Trumpler 10 555 Abt H.A. (1975) Publ. Astr. Soc. Pacific 87, 417 Spectral types in the open cluster NGC 6475 556 Breger M., Rybski P.M. (1975) Publ. Astr. Soc. Pacific 87, 607 Spectral types of faint Orion stars 557 Levato H., Malaroda S. (1975) Publ. Astr. Soc. Pacific 87, 823 Spectral types in the open cluster NGC 2451 558 Abt H., Levato H. (1975) Publ. Astr. Soc. Pacific 87, 849 Spectral types in the open cluster IC 4665 559 Cowley A.P. (1976) Publ. Astr. Soc. Pacific 88, 95 Spectral classification of the bright F stars 560 Abt H.A., Levato H. (1976) Publ. Astr. Soc. Pacific 88, 222 Spectral types in the open cluster M39 561 Levato H., Abt H.A. (1976) Publ. Astr. Soc. Pacific 88, 712 Spectral types in the Orion nebula cluster 562 Garrison R.F., Kormendy J. (1976) Publ. Astr. Soc. Pacific 88, 865 Some characteristics of the young open cluster Trumpler 37 563 Abt H.A., Levato H. (1977) Publ. Astr. Soc. Pacific 89, 29 Spectral types in the Coma Berenices cluster 564 Levato H., Abt H.A. (1977) Publ. Astr. Soc. Pacific 89, 274 Spectral types in the open cluster NGC 6633 565 Abt H.A. (1977) Publ. Astr. Soc. Pacific 89, 646 Spectral types in the open cluster NGC 2169 566 Abt H.A., Levato H. (1977) Publ. Astr. Soc. Pacific 89, 648 Spectral types in the open cluster M34 567 Abt H.A., Levato H. (1977) Publ. Astr. Soc. Pacific 89, 797 Spectral types in the Orion OB1 association 568 Perry C.L., Lee P.D., Barnes J.V. (1978) Publ. Astr. Soc. Pacific 90, 73 A photometric and spectroscopic study of the open cluster NGC 2169 569 Young A. (1978) Publ. Astr. Soc. Pacific 90, 144 Differential reddening in the young cluster NGC 2264 570 Abt H.A., Levato H. (1978) Publ. Astr. Soc. Pacific 90, 201 Spectral types in the Pleiades 571 Levato H., Abt H.A. (1978) Publ. Astr. Soc. Pacific 90, 429 Spectral types in the Ursa Major stream 572 Abt H.A. (1978) Publ. Astr. Soc. Pacific 90, 692 Spectral types in the Alpha Persei cluster 573 Grayzeck E.J., FitzGerald M.P., Luiken M. (1978) Publ. Astr. Soc. Pacific 90, 742 Study of the open cluster NGC 6546 and cepheid AV Sagitarii 574 Cowley A.P., Bidelman W.P. (1979) Publ. Astr. Soc. Pacific 91, 83 MK spectral types for some F and G stars 575 Abt H.A., Brodznick D., Schaeffer B. (1979) Publ. Astr. Soc. Pacific 91, 176 Spectral types of stars with unusual photometric indices 576 Levato H., Malaroda S. (1980) Publ. Astr. Soc. Pacific 91, 636 Spectral morphology in NGC 2287 577 Abt H.A., Perry C.L., Olsen E.H., Grauer A.D. (1980) Publ. Astr. Soc. Pacific 92, 60 A small cluster near IC 1805 578 Levato H., Malaroda S. (1980) Publ. Astr. Soc. Pacific 92, 323 Spectral types in the open cluster NGC 6231 579 Levato H., Malaroda S. (1981) Publ. Astr. Soc. Pacific 93, 714 Spectral morphology in the open cluster Collinder 228 580 Levato H., Malaroda S. (1982) Publ. Astr. Soc. Pacific 94, 807 Spectral morphology in Trumpler 16 581 FitzGerald M.P., Luiken M., Miller M. (1983) Publ. Astr. Soc. Pacific 95, 361 The spectroscopic parallax of Stock 14 582 Keenan P.C., Pitts R.E. (1985) Publ. Astr. Soc. Pacific 97, 297 Spectral types and luminosities of supergiants in open clusters 583 Halbedel E.M. (1985) Publ. Astr. Soc. Pacific 97, 434 Spectral types of companions to variable visual double stars 584 Abt H.A. (1986) Publ. Astr. Soc. Pacific 98, 307 MK classification of the brighter Praesepe stars 585 Glaspey J.W. (1987) Publ. Astr. Soc. Pacific 99, 1089 A spectroscopic study of the open cluster NGC 2281 586 Arnal M., Morrell N., Garcia B., Levato H. (1988) Publ. Astron. Soc. Pacific 100, 1076 The open cluster NGC 6193: another cluster rich in spectroscopic binaries 587 Morrell N., Garcia B., Levato H. (1988) Publ. Astron. Soc. Pacific 100, 1431 Spectral morphology in the open clusters Trumpler 14 and Trumpler 15 588 Crampton D. (1975) Publ. Astron. Soc. Pacific 87, 523 HD 219460 and the open cluster Ma 50 589 Smith H.A., Hesser J.E. (1983) Publ. Astron. Soc. Pacific 95, 277 Spectroscopy of upper-main-sequence and blue straggler stars in the intermediate-age cluster NGC 2477 701 Metreveli M.O. (1968) Abast. Astr. Obs. Bull. 38, 93 The catalogue of magnitudes, color-indices, spectral and luminosity classes of stars in the Milky Way in Taurus (The area III of the P. P. Parenago plan) 702 Bartaya R.A., Kharadze E.K. (1968) Abast. Astr. Obs. Bull. 38, 127 The catalogue of spectral and luminosity classes of stars in the O-associations Cas III, Cas IV, Cas VII 703 Shiukashwili M.A. (1968) Abast. Astr. Obs. Bull. 38, 151 Low dispersion spectral classification of stars in T-association Oph T1 and And T1 704 Chuadze A.D. (1973) Abast. Astr. Obs. Bull. 44, 105 The catalogue of magnitudes, color-indices, spectral and luminosity classes of stars in eight Kapteyn Selected Areas 711 Hack M. (1953) Ann. Astrophys. 16, 417 Etude du spectre d'absorption de 243 etoiles de types spectraux compris entre O6 et F8 pour la recherche de criteres quantitatives de classification spectrale bidimensionelle. 712 Divan L. (1954) Ann. Astrophys. 17, 456 Recherche sur la loi d'absorption de la poussiere interstellaire et sur le spectre continu des etoiles O et B. 713 Mannino G., Humblet J. (1955) Ann. Astrophys. 18, 237 Observations spectroscopiques de quelques etoiles of (I). 718 Andrillat Y. (1957) Ann. Astrophys. Suppl. no 2,270 Spectrophotometrie du spectre continu des etoiles de Wolf-Rayet. Determination des distances et des temperatures de couleur. Magnitudes absolues. 721 Morgan W.W., Keenan P.C. (1973) Ann. Rev. Astron. Astrophys. 11, 29 Spectral classification 725 Loden L.O. (1966) Ark. Astr. 4, 65 A study of NGC 2467 and the association Pup I 726 Lynga G. (1969) Ark. Astr. 5, 181 A catalogue of fain OB stars between Carina and Centaurus 727 Karlsson B. (1969) Ark. Astr. 5, 241 Investigations of a region in Monoceros. III. MK classification of stars 731 Hardorp J., Rohlfs K., Slettebak A., Stock J. (1959) Astr. Abh. Hamb. Sternw. Bergedorf 735 Zelwanowa E., Schoeneich W. (1971) Astr. Nach. 293, 155 Pekuliare A-Sterne in offenen Sternhaufen. I. Photoelektrische UBV- Photometric und MK-Klassifikation von Sternen im Gebiet von NGC 7039 741 Levato H., Malaroda S. (1984) Astrophys. Letters 24, 37 Spectral morphology in the open cluster IC 2391 751 Mendoza E. (1963) Bol. Obs. Tonantzintla Tacubaya 3, 137 Estudio espectroscopico y fotometrico del cumulo estelar en Coma Berenices 755 Iriarte B.E. (1975) Bol. Inst. Tonantzintla 1, 209 Spectral types for the brightest flare stars in the Pleiades 761 Mayer P., Macak P. (1971) Bull. Astr. Inst. Czech. 22, 46 Spectral classification and photometry of stars in two HII regions 771 Pottasch S. (1956) Bull. Astron. Inst. Netherlands 13, 77 A study of bright rims in diffuse nebulae 772 Borgman J. (1960) Bull. Astron. Inst. Netherlands 15, 255 Seven-colour photometry of O, B and A stars 775 Andersen J., Nordstrom B. (1978) Bull. Inform. CDS 15, 39 Corrections to spectral types of bright southern stars 781 Bernacca P.L. (1967) Contr. Oss. Astr. Univ. Padova No 202 On the spectrum-color discrepancy of some late B stars in Orion 785 Hiltner W.A. (1966) IAU Symp. 24, 373 The HR diagram of NGC 1893 786 Keenan P.C. (1973) IAU Symp. 54, 68 Luminosity calibration of giants and supergiants, G0-M5 791 Halbedel E.M. (1984) Inform. Bull. Var. Stars no 2550 Spectral types of eclipsing binaries in optical coincidence with clusters and associations 795 Numerova A.B. (1958) Izv. Krym. Astrofis. Obs. 19, 189 The space distribution of early type stars in Cygnus 796 Kopylov I.M. (1958) Izv. Krym. Astrofis. Obs. 20, 156 A two dimensional quantitative spectral classification of 238 O5-B7 stars and the construction of a spectrum-absolute magnitude diagram 797 Kumaigorodskaya R.N. (1960) Izv. Krym. Astrofis. Obs. 24, 91 A spectrophotometric study of stars 801 Chopinet M. (1956) J. Obs. 39, 79 Caracteres spectraux de quelques etoiles particulieres 802 Mianes P., Daguillon J. (1957) J. Obs. 40, 65 Photometrie en trois couleurs de l'amas NGC 7243 803 Boulon J., Duflot M., Fehrenbach C. (1958) J. Obs. 42, 1 La mesure des vitesses radiales au prisme objectif. X. 804 Bertaud Ch. (1958) J. Obs. 42, 55 Catalogue et bibliographie des etoiles a spectre particulier. 805 Boulon J., Fehrenbach C. (1958) J. Obs. 42, 149 La mesure des vitesses radiales au prisme objectif 806 Bertaud C. (1960) J. Obs. 43, 129 Catalogue et bibliographie des etoiles a spectre particulier. Premier supplement 807 Perraud H. (1961) J. Obs. 44, 247 Liste et classification d'etoiles M,S,C trouvees dans divers champs pris aux prismes objectifs a vision directe 811 Turner D.G. (1979) J. R. Astron. Soc. Canada 73, 74 A study of the extinction in the young open cluster NGC 6823 812 Corbally C.J., Garrison R.F. (1983) J. R. Astron. Soc. Canada 77, 28 MK spectral classification in the Praesepe lower main sequence 825 Woods M.L. (1958) Mem. Commonwealth Obs. Mount Stromlo 16, 125 Spectral types of bright southern stars 831 Feast M.W., Thackeray A.D., Wesselink A.J. (1955) Mem. R. Astr. Soc. 67, 51 Radial velocities of southern B stars determined at the Radcliffe Observatory 832 Feast M.W., Thackeray A.D., Wesselink A.J. (1957) Mem. R. Astr. Soc. 68, 1 Radial velocities of southern B stars determined at the Radcliffe Observatory 833 Thackeray A.D., Tritton S.B., Walker E.N. (1973) Mem. R. Astr. Soc. 77, 199 Radial velocities of southern B stars determined at the Radcliffe observatory - VII. 834 Hill G., Hilditch R.W., Younger F., Fisher W.A. (1975) Mem. R. Astr. Soc. 79, 131 MK classification of some northern hemisphere binary systems 835 Hill G., Allison A., Fisher W.A., Odgers G.F., Et al (1976) Mem. R. Astr. Soc. 82, 69 Studies of A and F stars in the region of the north galactic pole-I 841 Buscombe W. (1959) Mount Stromlo Obs. mim no 3 Spectral classification of southern fundamental stars 842 Buscombe W. (1961) Mount Stromlo Obs. mim no 4 Spectral classification of southern fundamental stars 843 Buscombe W. (1962) Mount Stromlo Obs. Mim no 6 Spectral classification of southern fundamental stars 845 Eggen O.J. (1958) Observatory 78, 21 The Zeta Herculis group of high-velocity stars 846 Sahade J. (1958) Observatory 78, 79 On the nature of the Wolf-Rayet stars 861 Duflot M., Fehrenbach C., Guillaume J., Ray G. (1960) Publ. Obs. Haute-Provence 4 no 12 La mesure des vitesses radiales au prisme objectif. VII Ameliorations du spectrocomparateur a projection 862 Boulon J., Duflot M., Fehrenbach C., Duflot A., Rebeirot E., Petit M. (1960) Publ. Obs. Haute-Provence 4 no 34 La mesure des vitesses radiales au prisme objectif. IX. 3eme liste de vitesses radiales determinees au prisme objectif a vision directe 863 Bouigue M.R. (1960) Publ. Obs. Haute-Provence 4 no 52 Contribution aux recherches de photometrie photoelectrique dans la Galaxie. I - V. 864 Boulon J., Fehrenbach C. (1960) Publ. Obs. Haute-Provence 4 no 55 865 Barbier M., Boulon J. (1960) Publ. Obs. Haute-Provence 5 no 3 La mesure des vitesses radiales au prisme objectif. XI. 1eme liste de vitesses radiales d'etoiles O et B determinees au prisme objetcif a vision directe 866 Barbier M. (1962) Publ. Obs. Haute-Provence 6 no 8 Structure de la galaxie dans la region de P Cygni 867 Barbier M. (1963) Publ. Obs. Haute-Provence 6 no 36 La mesure des vitesses radiales au prisme objectif. XV. 7eme liste de vitesses radiales determinees au prisme objectif a vision directe 868 Perraud H. (1962) Publ. Obs. Haute-Provence 7 no 8 869 Rebeirot E. (1966) Publ. Obs. Haute-Provence 8 no 4 Observation spectroscopique d'une eruption de potassium dans l'etoile "4 Herculis" 870 Fehrenbach C., Duflot M., Boulon J., Rebeirot E. (1966) Publ. Obs. Haute-Provence 8 no 25 La mesure des vitesses radiales au prisme objectif. XIX. Liste de 893 vitesses radiales determinees au prisme objectif a vision directe 871 Martin N. (1967) Publ. Obs. Haute-Provence 9 no 13 La mesure des vitesses radiales au prisme objectif. XX. Liste de 309 vitesses radiales determinees au prisme objectif a vision directe 872 Georgelin Y. (1967) Publ. Obs. Haute-Provence 9 no 27 Etude cinematique et photometrique d'une region de Cassiopee 875 Ishida K, (1970) Publ. Astr. Soc. Japan 22, 277 Spectrographic observations of IC 1805 876 Yamasaki A., Kitamura M. (1972) Publ. Astr. Soc. Japan 24, 213 The close binary system TX Cancri 891 Petrie R.M., Heard J.F. (1970) Publ. Dom. Astr. Obs. 13, 329 The radial velocities and luminosities of 77 stars in the field of the Alpha Persei cluster 901 Heard J.F. (1956) Publ. David Dunlap Obs. 2 no 4 The radial velocities, spectral classes and photographic magnitudes of 1041 late-type stars 902 Guetter H.H. (1964) Publ. David Dunlap Obs. 2 no 13 Distances of 97 OB stars 911 Stephenson C.B., Sanduleak N. (1971) Publ. Warner Swasey Obs. 1 no 1 Luminous stars in the southern Milky Way 921 Bisiacchi G.P., Firmani C., Ortega R., Peniche R. (1976) Rev. Mex. Astron. Astrofis. 2, 13 Spectral classification of early type stars. Calibration using a TV-vidicon multichannel system 922 Levato H., Malaroda S. (1979) Rev. Mex. Astron. Astrofis. 4, 321 Spectral types in the Zeta Sculptoris open cluster 931 Waymann P.A. (1961) R. Obs. Bull. no 36 Fundamental data for southern stars. III. A-type stars near the south galactic pole 932 Evans D.S. (1961) R. Obs. Bull. no 44 Observations of twenty-four single-lined variables 933 Evans D.S. (1961) R. Obs. Bull. no 48 Fundamental data for southern stars (Fourth list) 934 Eggen O.J. (1961) R. Obs. Bull. no 51 Space-velocity vectors for 3483 stars with proper motion and radial velocity 935 Cousins A.W.J., Stoy R.H. (1963) R. Obs. Bull. no 64 Photoelectric magnitudes and colours of southern stars 936 Bennett N.W.W., Evans D.S., Laing J.D. (1963) R. Obs. Bull. no 78 The southern spectroscopic binaries HD 16589, 24202, 153890 and 197649 937 Evans D.S., Laing J.D., Menzies A., Stoy R.H. (1964) R. Obs. Bull. no 85 Fundamental data for southern stars (Fifth list) 938 Palmer D.R., Walker E.N., Jones D.H.P., Wallis R.E. (1968) R. Obs. Bull. no 135 The radial velocities, spectral types and projected rotational velocities of 633 bright northern A stars 939 Harding G.A., Fahim F., Haslam M.C. (1971) R. Obs. Bull. no 165 Motion of A0 stars perpendicular to the galactic plane 941 XX (1961) R. Obs. Cape mim no12 945 Raznik R.M. (1971) Sov. Astr. A.J. 48, 755 948 Ismailov N.Z. (1988) Soviet Astron. Lett. 14, 138 Analysis of spectra of three stars in the Theta1 Orionis Trapezium 951 Wenzel W. (1951) Veroeff. Sternw. Sonneberg 5, 1 955 Morgan W.W., Harris III D.L. (1956) Vistas Astron. 2,1124 The galactic cluster M29 (NGC 6913) 956 Morgan W.W., Loden K. (1964) Vistas Astron. 8, 83 Some characteristics of the Orion association 961 Miczaika G.R. (1951) Z. Astrophys. 29, 262 962 Heckman O., Lubeck K. (1958) Z. Astrophys. 45, 243 Das Farben-Helligkeits-Diagramm des Bewgungshaufens um Alpha Persei 963 Appenzeller I. (1966) Z. Astrophys. 64, 269 Polarimetrische, photometrische und spectroskopische Beobachtungen von Sternen im Cygnus und Orion 980 Morgan, W.W., Keenan, P.C., Kellman, E. (1943) An Atlas of Stellar Spectra. Chicago Univ. Press 981 Kraft, R.P., Greenstein, J.L. (1969) Low luminosity Stars. 982 General Catalogue of Variable Stars (1958) 983 Houck, T.E. (1956) Dissertation 984 Pendl, E.S., Sewggewiss, W. (1975) IAU Coll. 32, 357 Are all blue stragglers Ap stars? 999 The University of Michigan Catalogue of two-dimensional Spectral Types for the HD stars (Ann Arbor) Vol 1 (1975) Houk N., Cowley A.P. Vol 2 (1978) Houk N. Vol 3 (1982) Houk N. Vol 4 (1988) Houk N., Smith-Moore M. 1000 Zakirov M.M. (1990) Kinematika Fizika Nebesn. 6, 42 Open star cluster Dol 42 and the eclipsing variable V478 Cyg