Mamajek 1

Number of stars per data source

	Reference   32 :    1 star
	Reference  999 :    1 star

32: Morris P.M.; (1961) Mon. Not. R. Astr. Soc. 122, 325; The Scorpio-Centaurus association. II. Spectral types and luminosities of 200 O, B and A stars; 1961MNRAS.122..325M
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