Autor:	Hall, E. Raymond, Gander, Frank F., Dixon, Joseph, Abbott, Clinton G., McCabe, Thomas T., McCabe, Elinor Bolles, Woods, Robert S., Alexander, Annie M., Wetmore, A., Swarth, H. S., Michener, Harold
Zdroj:	The Condor, 1927 Nov 01. 29(6), 271-276.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/1362958 Zobrazit plný text záznamu