Leo K. Couch: Trapping and transplanting Live Beavers, Division of Wildlife Research, United States Department of the Interior Conservation Bulletion 30, 1942
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Middleton: Beaver Hunting in Canada 1777
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Conrad Gesner Historiæ Animalium 1558
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Kanadisches Mobilisierungsplakat 2.Weltkrieg
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Briefmarke Polen Biber 1,25 Zloty
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Wappen Eno (Finnland)
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