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  1. By: Petersen, Margaret R. - Weir, Douglas N. - Dick, Matthew H. - U.S. Fish and Wildlife Service
    Publication info: [Washington, D.C.], U.S. Dept. of the Interior, Fish and Wildlife Service, [1991]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Petersen, Margaret R. - Weir, Douglas N. - Dick, Matthew H
    Type: Article
    In: North American fauna
    Volume: 76
    Date: 1991
    Page Range: 1--158
    Publication Info: Washington, Fish and Wildlife Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off,
  2. By: Weir, Douglas N. - Hanson, Ann
    Type: Article
    In: The Canadian field-naturalist
    Volume: 103
    Issue: 1
    Date: 1989
    Page Range: 12--17
    Publication Info: Ottawa Ottawa Field-Naturalists' Club