Collinder 197

Number of stars per data source

	Reference  273 :    1 star
	Reference  425 :    3 stars
	Reference  478 :    1 star
	Reference  999 :    2 stars

273: Crampton D.; (1971) Astron. J. 76, 260; Observations of stars in HII regions: Spectral classification and UBV photometry; 1971AJ.....76..260C
425: FitzGerald M.P., Luiken M., Maitzen H.M., Moffat A.F.J.; (1979) Astron. Astrophys. Suppl. 37, 345; Analysis of the results of MK classification of 176 stars in 37 southern open clusters; 1979A&AS...37..345F
478: Buscombe W.; (1969) Mon. Not. R. Astr. Soc. 144, 31; Line strengths for southern OB stars - II; 1969MNRAS.144...31B
999: Houk N., Cowley A.P., Smith-Moore M.; University of Michigan (Ann Arbor) Vol 1 (1975), Vol 2 (1978), Vol 3 (1982), Vol 4 (1988), Vol 5 (1999); The University of Michigan Catalogue of two-dimensional Spectral Types for the HD stars; 1975mctd.book.....H