Type:		Journal, Article
Title:		On the Relation Between Brightness and Spectral Type in the Pleiades
Author(s):		Rosenberg, H.
Date:		1910/06
Abstract:		The first HR diagram to be published (of the Pleiades cluster), by Hans Rosenberg in June 1910
Journal (full):		Astronomische Nachrichten
Volume:		186
Issue:		4445
Start Page:		71
Link:		http://www.leosondra.cz/en/first-hr-diagram/