Autor:	Taverner, P. A., Michael, Charles W., Clabaugh, Ernest D., Huey, Laurence M., von Bloeker, Jack C., Wilson, A. V., Cottam, Clarence, Rowley, J. Stuart, Hanna, Wilson C., Dickey, Donald R., Abbott, Clinton G., Cozens, Harold H., Jewett, Stanley G., Bailey, Alfred M.
Zdroj:	The Condor, 1928 Mar 01. 30(2), 157-165.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/1363163 Zobrazit plný text záznamu