Berkeley 87

Number of stars per data source

	Reference  116 :    1 star
	Reference  334 :   13 stars
	Reference 1006 :    3 stars

116: Lee T.A.; (1970) Astrophys. J. 162, 217; Photometry of high-luminosity M-type stars; 1970ApJ...162..217L
334: Massey P., DeGioia-Eastwood K., Waterhouse E.; (2001) Astron. J. 121, 1050; The progenitor masses of Wolf-Rayet stars and luminous blue variables determined from cluster turnoffs. II. Results from 12 galactic clusters and OB associations; 2001AJ....121.1050M
1006: Negueruela I.; (2004) Astron. Nach. 325, 380; A search for luminous Be stars; 2004AN....325..380N