N.. NRAO 300-ft telescope data N1 NRAO 300-ft telescope data: Pauliny-Toth et al., 1966ApJS...13...65P N2 NRAO 300-ft telescope data: The present observations C.. CIT Interferometer data C1 CIT Interferometer data: Fomalont and Moffet, 1971AJ.....76....5F C2 CIT Interferometer data: Fomalont, 1968ApJS...15..203F C3 CIT Interferometer data: Fomalont, 1971AJ.....76..513F C4 CIT Interferometer data: The present observations C5 CIT Interferometer data: Fomalont et al., 1967, Publ. Owens Valley Radio Obs. 1, No. 3 C6 CIT Interferometer data: Olsen, 1967AJ.....72..738O C7 CIT Interferometer data: Fomalont, 1971, Publ. Owens Valley Radio Obs. 1, No. 5 C8 CIT Interferometer data: Maltby and Moffet, 1962ApJS....7..141M KPW Kellermann et al., 1969ApJ...157....1K 1 Polarization data: Bologna et al., 1969ApJ...156..815B 2 Polarization data: Gardner et al., 1969AuJPh..22...79G 3 Polarization data: Morris and Berge, 1964AJ.....69..641M 4 Polarization data: Morris and Radhakrishnan, 1963ApJ...137..147M 5 Polarization data: Weighted vector average of Refs. 1 and 2. 6 Polarization data: Weighted vector average of Refs. 2 and 3. A1 Accurate positions for unresolved sources: Wade et al., 1970ApJ...162..381W A2 Accurate positions for unresolved sources: Elsmore and Mackay, 1969MNRAS.146..361E A3 Accurate positions for unresolved sources: Clark and Hogg, 1966ApJ...145...21C A4 Accurate positions for unresolved sources: Hogg, 1969ApJ...155.1099H A5 Accurate positions for unresolved sources: Hazard et al., 1964Natur.202..227H A6 Accurate positions for unresolved sources: Clarke and Batchelor, 1965Natur.207..511C A7 Accurate positions for unresolved sources: Hazard et al., 1968ApJ...154..413H A8 Accurate positions for unresolved sources: Taylor, 1966ApJ...146..646T A9 Accurate positions for unresolved sources: Parker et al., 1966Natur.210...22P A10 Accurate positions for unresolved sources: Cohen and Shaffer, 1971AJ.....76...91C A11 Accurate positions for unresolved sources: Wade and Miley, 1971AJ.....76..101W A12 Accurate positions for unresolved sources: Moseley et al., 1970AJ.....75.1015M A13 Accurate positions for unresolved sources: Miley et al., 1970ApJ...159L..19M M1 Maps of extended sources: MacDonald et al., 1968MNRAS.138..259M M2 Maps of extended sources: Mackay, 1969MNRAS.145...31M M3 Maps of extended sources: Clark and Hogg, 1966ApJ...145...21C M4 Maps of extended sources: Hogg, 1969ApJ...155.1099H M5 Maps of extended sources: Mitton, 1970MNRAS.149..101M M6 Maps of extended sources: Mitton and Ryle, 1969MNRAS.146..221M M7 Maps of extended sources: Mitton, 1970ApL.....5..207M M8 Maps of extended sources: Graham, 1970MNRAS.149..319G M9 Maps of extended sources: Miley et al., 1967Natur.216..974M M10 Maps of extended sources: Mitton, 1970ApL.....6..161M M11 Maps of extended sources: Occultations; cf Cohen, 1969ARA&A...7..619C for references. M12 Maps of extended sources: Hazard, 1962MNRAS.124..343H M13 Maps of extended sources: Hazard et al., 1964Natur.202..227H M14 Maps of extended sources: Gulkis et al., 1969ApJ...157.1047G M15 Maps of extended sources: De Jong, 1967ApJ...148..651D M16 Maps of extended sources: Taylor, 1966ApJ...146..646T M17 Maps of extended sources: Taylor, 1967ApJ...150..421T M18 Maps of extended sources: Taylor and De Jong, 1968ApJ...151...33T M19 Maps of extended sources: Talen, 1965AJ.....70..694T M20 Maps of extended sources: Moffet et al., 1967ApJ...148..283M M21 Maps of extended sources: Ryle et al., 1965Natur.207.1024R M22 Maps of extended sources: Ryle and Windram, 1968MNRAS.138....1R M23 Maps of extended sources: Branson, 1965Obs....85..250B M24 Maps of extended sources: MacDonald and Kenderdine, 1967Natur.215..603M M25 Maps of extended sources: Parker and Kenderdine, 1967Obs....87..124P M26 Maps of extended sources: Mackay, 1970ApL.....5..173M M27 Maps of extended sources: MacDonald et al., 1966Natur.211.1241M M28 Maps of extended sources: Clark and Miley, 1969ApL.....4..20C M29 Maps of extended sources: Fomalont, 1971AJ.....76..513F M30 Maps of extended sources: Miley and Wade, 1971ApL.....8...11M P1 Positions only, structures unknown: Clarke, T. W. et al., 1969AuJPA..10....C P2 Positions only, structures unknown: Wills, 1967MNRAS.135..339W P3 Positions only, structures unknown: Bailey and Pooley, 1968MNRAS.138...51B P4 Positions only, structures unknown: Thomson et al., 1968ApJ...154L...1T P5 Positions only, structures unknown: Merkelijn, 1969AuJPh..22..237M P6 Positions only, structures unknown: Wills and Bolton, 1969AuJPh..22..775W P7 Positions only, structures unknown: Olsen, 1967AJ.....72..738O P8 Positions only, structures unknown: Moseley et al., 1970AJ.....75.1015M P9 Positions only, structures unknown: Backer et al., 1970AJ.....75..529B S1 Structures only: Hogg, 1969ApJ...155.1099H S2 Structures only: Bash, 1968ApJS...16..373B, unresolved sources S3 Structures only: Bash, 1968ApJS...16..373B, resolved sources S4 Structures only: Palmer et al., 1967Natur.213..789P S5 Structures only: Anderson and Donaldson, 1967MNRAS.137...81A S6 Structures only: Ekers (Ed.), 1969, Aust. J. Phys. Astrophys. Suppl. No. 7 S7 Structures only: Sutton et al., 1967AJ.....72..831S S8 Structures only: Biraud et al., 1960Obs....80..116B S9 Structures only: MacDonald and Miley, 1971ApJ...164..237M VLB1 Long baseline interferometry: Broten et al., 1969MNRAS.146..313B and Clarke, R. W. et al. 1969MNRAS.146..381C VLB2 Long baseline interferometry: Jauncey et al., 1970ApJ...160..337J VLB3 Long baseline interferometry: Kellermann et al., 1970ApJ...161..803K VLB4 Long baseline interferometry: Kellermann et al., 1971ApJ...169....1K VLB5 Long baseline interferometry: Broderick et al., 1972ApJ...172..299B VLB6 Long baseline interferometry: Cohen, Cannon, Purcell, Shaffer et al., 1972, ApJ, in press SC1 Scintillation data: Little and Hewish, 1968MNRAS.138..393L SC2 Scintillation data: Cohen et al., 1967ApJ...150..767C SC3 Scintillation data: Harris and Gundermann-Hardebeck, 1969ApJS...19..115H SC4 Scintillation data: J. Ekers (Ed.), 1969AuJPA...7....E, and R. Ekers, private communication VAR1 Variable radio sources: Kellermann and Pauliny-Toth, 1968ARA&A...6..417K VAR2 Variable radio sources: W. J. Medd, private communication VAR3 Variable radio sources: D. E. Hogg, private communication