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  Mammal Species of the World - Browse: americanus

  http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=14000953

  Mammal Species of the World: Information on americanus

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  Mammal Species of the World - Browse: Ursidae

  http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=14000939

  Mammal Species of the World: Information on Ursidae

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