1 Campbell & Moore (1928PLicO..16....1C): Lick 0.91-m refractor,
 1  New Mill's spg., photographic plates.
 2 Frost et al. (1926ApJ....64....1F): Yerkes 0.40-m refractor, 1-prism Bruce
 2  spg., photographic plates.
 3 Beardsley (1969PAllO...8...91B): Allegheny 0.79-m Keeler Memorial reflector, 
 3  1-prismMellon spg., photographic plates.
 4 Henroteau (1922PDO.....5..331H): Ottawa 0.38-m refractor, 2-prism spg.,
 4  photographic plates.
 5 Tarasov et al. (1995A&AS..110...59T): DAO 1.83-m reflector, Cassegrain
 5  grating spg., Reticon RL 1872F/30.
 6 Gies & Kullavanijaya (1988ApJ...326..813G) + Gies (priv. com., HJD 46334):
 6  McDonald 2.7-m reflector, coude grating spg., Octicon detector
 6  (8xRL 1872F/30 Reticon).
 7 Tarasov et al. (1995A&AS..110...59T): Ondrejov 2.0-m reflector,
 7  coude grating spg., blue photographic plates.
 8 Tarasov et al. (1995A&AS..110...59T): Crimean Astrophysical Observatory 2.6-m
 8  reflector, coude grating spg. with a 576x380-pixel GEC CCD, (in column No.
 8  of obs. RVs from all profiles/RVs from only symmetric HeI 6678 profiles).
 9 Morrell & Abt (1992ApJ...393..666M): Kitt Peak 1.0-m reflector, coude grating
 9  spg., blue Texas Instruments CCD 800x800 pixels spectrograms.
10 Tarasov et al. (1995A&AS..110...59T): University of British Columbia 0.4-m
10  reflector, blue Reticon RL 1872F/30 spectra.
11 This paper: Ondrejov 2.0-m reflector, coude grating spg., Reticon RL 1872F/30
11  (with 15um pixels) red spectra.
12 This paper: DAO 1.2-m reflector, coude grating spg. with a thick Loral 
12  4096x200 CCD device (15um pixels), red spectra.
13 De Cat et al. (2000A&A...359..539D) and this paper: Observatoire de Haute
13  Provence (OHP) 1.52-m reflector, AURELIE spg., CCD EEV (2048x1024 pixels)
13  spectra centred to 4560 .
14 This paper: Ondrejov 2.0-m reflector, HEROS chelle spg.
15 This paper: Ondrejov 2.0-m reflector, CCD700 slit spg.