IC 2581

Number of stars per data source

	Reference    5 :    1 star
	Reference    6 :    1 star
	Reference    9 :    1 star

5: Cameron R.C.; (1966) Georgetown Obs. Monogr. no. 21; An investigation of the magnetic and related stars through narrow-band photometry
6: Crawford D.L., Barnes J.V.; (1969) Astron. J. 74, 1008; Interstellar reddening for globular clusters M3 and M13; 1969AJ.....74.1008C
9: Epstein I.; (1968) Astron. J. 73, 556; Four-color photoelectric photometry of two high latitude clusters Blanco 1 and Melotte 227; 1968AJ.....73..556E