References for the numbering systems

Col	Reference

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R1 van Schewick H. 1966, Veroeff. Astr. Inst. Univ. Bonn no 74

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

R3 Lynga G. 1959, Medd. Lunds Obs. I no 194

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

R5 Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17, 347 (pe)

R6 Hoag A.A., et al. 1961, Publ. US. Nav. Obs. 17, 347 (pg)

R7 Ishmukhamedov Kh.Z. 1967, Tsirk. Astr. Obs. Tashkent no 346

R8 Rojo Arellano E., et al. 1997, Astron. Astrophys. Suppl. 123, 25

R9 Prisinzano L., et al. 2003, Astron. Astrophys. 404, 927


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