References for the numbering systems

Col	Reference

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

R1 Trumpler R.J. 1938, Lick Obs. Bull 18, 167

R2 Meyermann B. 1930, Veroeff. Univ. Sternw. Gottingen 1, 313

R3 Oelander 1927, Soc. Scient. Fenn. 4 no 11

R4 Heckmann O. 1929, Veroeff. Univ. Sternw. Gottingen 1, 141

R5 Rufener F. 1971, Astron. Astrophys. Suppl. 3, 181 no 3

R6 von Prittwitz F. 1903, Astr. Nach. 161, 1

R7 Pickering E.C. 1891, Harvard Coll. Obs. Ann. 26, 272

R8 Artyukhina N.M. 1955, Tr. Gos. Astr. Inst. Sternberga 26, 63

R9 Abad C., Vicente B. 1999, Astron. Astrophys. Suppl. 136, 307

R10 Randich S., Schmitt J.H.M.M., Prosser C. 1996, Astron. Astrophys. 313, 815

R11

R12

R13

R14 Argue A.N. 1963, Mon. Not. R. Astr. Soc. 127, 97


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