History of North American pinnipeds : a monograph of the walruses, sea-lions, sea-bears and seals of North America Allen, J. A. (Joel Asaph), 1838-1921 creator text book Washington G.P.O 1880 1880
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ENG Mammals North America Pinnipedia QL737.P6 A4 1880 Miscellaneous publications (Geological and Geographical Survey of the Territories (U.S.)), no. 12 https://www.biodiversitylibrary.org/bibliography/23136 gs07001537 10.5962/bhl.title.23136 DLC/ICU