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  1. By: Ruff, Robert L. - Craven, Scott R. - University Of Wisconsin--Madison. Department of Wildlife Ecology. - United States. Extension Service. Natural Resources Unit. - U.S. Fish And Wildlife Service. Office of Extension and Publications.
    Edition: 2nd ed.
    Publication info: Madison, Wis, Dept. of Wildlife Ecology, Cooperative Extension Programs, University of Wisconsin, [1986]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library