References for the numbering systems

Col	Reference

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

R1 Cuffey J. 1941, Astrophys. J. 94, 55

R2 Smyth M.J., Nandy K. 1962, Publ. R. Obs. Edinburgh III no 2

R3 Meurers J. 1962, Veroeff. Univ. Sternw. Bonn no 61

R4 Zurhellen W. 1909, Veroeff. Konig. Sternw. Bonn no 11

R5 Chevalier S. 1916, Ann. Obs. Astr. Zo-Se

R6 Stetson P.B. 1981, Astron. J. 86, 1500

R7 Andersen T.B., Reiz A. 1983, Astron. Astrophys. Suppl. 53, 181

R8 Stetson P.B. 2000, Publ. astron. Soc.Pacific 112, 925

R9 Henden A. 2003, Sequence fields

R10 Sharma S. et al., 2006, Astron. J. 132, 1669


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