• 

  Mammal Species of the World - Browse: lupus

  http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=14000739

  Mammal Species of the World: Information on lupus

• 

  Mammal Species of the World - Browse: lupus

  http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=14000738

  Mammal Species of the World: Information on lupus

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