Autor:	Struve, Otto, Sahade, Jorge, Herrick, Samuel, Hilton, Charles G., Hack, Margherita
Zdroj:	Publications of the Astronomical Society of the Pacific, 1958 Feb 01. 70(412), 111-114.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/40676763 Zobrazit plný text záznamu