SIMBAD references

1971AJ.....76.1048C - Astron. J., 76, 1048-1057 (1971)

Four-color and H-beta photometry for open clusters. VII. NGC 6231 and the I Sco association.

CRAWFORD D.L., BARNES J.V., HILL G. and PERRY C.L.

Journal keyword(s):

Simbad objects: 142

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