Autor:	Emlen, John, Kapustka, Larry, Barnthouse, Larry, Beyer, Nelson, Biddinger, Greg, Kedwards, Tim, Landis, Wayne, Menzie, Charlie, Munns, Wayne, Sorensen, Mary, Wentsel, Randy
Zdroj:	Bulletin of the Ecological Society of America, 2002 Oct 01. 83(4), 269-271.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/27650517 Zobrazit plný text záznamu Plný text