Praesepe

Number of stars per data source

	Reference    6 :    1 star
	Reference   18 :    1 star
	Reference   37 :    2 stars
	Reference   38 :    2 stars
	Reference   53 :    4 stars
	Reference  107 :    4 stars

References

6: Janes K.A., McClure R.D.; (1971) Astrophys. J. 165, 561; Strong-cyanogen stars: photometry and kinematics; 1971ApJ...165..561J
18: Janes K.A.; (1972) Thesis ( private communication ); An investigation of stellar populations among G and K giant stars
37: Yoss K.M.; (1977) Astron. J. 82, 832 (table I.); Accuracy of two-dimensional spectral classes derived through DDO photometry; 1977AJ.....82..832Y
38: Yoss K.M.; (1977) Astron. J. 82, 832 (table ii,); Accuracy of two-dimensional spectral classes derived through DDO photometry; 1977AJ.....82..832Y
53: Janes K.A.; (1979) Astrophys. J. Suppl. 39, 135; Evidence for an abundance gradient in the galactic disk; 1979ApJS...39..135J
107: Claria J.J., Piatti A.E., Osborn W.; (1996) Publ. Astron. Soc. Pacific 108, 672; DDO metal abundances of high-luminosity late-type stars in galactic open clusters; 1996PASP..108..672C