NGC 6940

Number of stars per data source

	Reference   45 :   11 stars
	Reference   61 :    7 stars
	Reference  207 :    2 stars
	Reference  539 :    1 star

45: Walker M.F.; (1960) Astrophys. J. 128, 562; Photoelectric observations of the galactic cluster NGC 6940; 1960ApJ...128..562W
61: Svolopoulos S.N.; (1961) Astrophys. J. 134, 612; Spectral classification in some open clusters; 1961ApJ...134..612S
207: Hoag A.A., Applequist L.; (1965) Astrophys. J. Suppl. 12, 215; Distance moduli of open clusters; 1965ApJS...12..215H
539: Cowley A.P., Cowley C.R.; (1965) Publ. Astr. Soc. Pacific 77, 184; Slit spectra of some peculiar and metallic-line A stars; 1965PASP...77..184C