References for the numbering systems

Col	Reference

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R1 Fernandez J.A., Salgado C.W. 1980, Astron. Astrophys. Suppl. 39, 11

R2 Koelbloed D. 1959, Bull. Astr. Inst. Netherl. 14, 265

R3 King D.S. 1978, Sydney Obs. Papers no 79

R4 Gieseking F. 1981, Astron. Astrophys. 99, 155

R5 Butler C.J. 1977, Mon. Not. R. Astr. Soc. 178, 159

R6 Gould B.A. 1897, Cordoba Photographs of open clusters

R7 Andersen T.B., Reiz A. 1983, Astron. Astrophys. Suppl. 53, 18


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