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Please read BHL's Acknowledgment of Harmful Content
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  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,