NGC 1931

Number of stars per data source

	Reference   81 :  136 stars

References

 81
Bhatt B.C., Pandey A.K., Mahra H.S., Paliwal D.C.
(1994) Bull. Astron. Soc. India 22, 291
CCD photomery of galactic open clusters - III. NGC 1931
1994BASI...22..291B