References for the numbering systems

Col	Reference

--- ---------

R1 Ogura K., Ishida K. 1981, Publ. Astron. Soc. Japan 33, 149

R2 van Schewick H. 1958, Veroeff. Univ. Sternw. Bonn no 51

R3 Johnson H.L. 1962, Astrophys. J. 136, 1135

R4 Zug R.S. 1933, Lick Obs. Bull. 16, 119

R5 Hayford P. 1933, Lick Obs. Bull. 16, 50

R6 Kirillova T.S. 1958, Trudy Gos. Astr. Obs. XXIX, 178

R7 Loden L.O. 1957, Ark. Astr. 2, 39

R8 Massey P., et al. 1995, Astrophys. J. 454, 151

R9 Verschueren W. 1991, Thesis (Free Univ. Brussels)

R10 Park B.-G., Sung H. 2002, Astron. J. 123, 892

R11

R12 Chen L. et al. 2007, Astron. J. 134, 1368


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