Hogg 18

Number of stars per data source

	Reference  193 :    1 star
	Reference  470 :    1 star

193: Kilkenny D.; (1978) Mon. Not. R. Astron. Soc. 182, 629; Four-colour photometry of southern early-type stars; 1978MNRAS.182..629K
470: Knude J.; (1992) Astron. Astrophys. Suppl. 92, 841; uvby Beta observations of 528 type B stars with V between the 8th and 9th magnitude; 1992A&AS...92..841K