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Haunts in Denmark for white-fronted goose "anser albifrons" bean goose "anser fabalis non brachyrhynchus" and pink-footed goose "anser fabalis brachyrhynchus"

Mette Fog

出版	Kal\|o, 1971
URL	http://books.google.com.hk/books?id=dCXyygAACAAJ&hl=&source=gbs_api