Numbers and Distribution of Whooper Swans Breeding, Wintering and on Migration in Estonia, 1990-2000

Autor:	Luigujõe, Leho, Kuresoo, Andres, Leivits, Agu
Zdroj:	Waterbirds: The International Journal of Waterbird Biology, 2002 Jan 01. 25, 61-66.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/1522335 Zobrazit plný text záznamu