NGC 654

Number of stars per data source

	Reference   26 :    1 star
	Reference   69 :    3 stars

26: Dawson D.W.; (1976) Contr. Obs. New Mexico Univ. vol. 1, 140 no. 4; Intermediate-band photometry of faint standard stars
69: Schmidt E.G.; (1984) Astrophys. J. Suppl. 55, 455; Yellow giants in young clusters. I. Photometric observations; 1984ApJS...55..455S