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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Sterner, R. T. - Thompson, R. D. - Denver Wildlife Research Center.
    Publication info: Denver, CO, U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service, Science and Technology, Denver Wildlife Research Center, [1990]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Environmental aspects  Environmental testing  Phosphorus  Pigeons  Prairie dogs  Smoke screens  Toxicology