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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Witmer, Gary William. - Pitt, William C. - Fagerstone, Kathleen A., - United States. Animal and Plant Health Inspection Service. - Wildlife Services (U.S.) - National Wildlife Research Center (U.S.)
    Publication info: Fort Collins, CO, USDA APHIS Wildlife Services, National Wildlife Research Center, 2007
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library