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The future of BHL is uncertain, but hopeful. Learn more.
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  1. By: United States. Animal and Plant Health Inspection Service. Plant Protection and Quarantine Programs. Biological Control Operations.
    Publication info: [Frederick, MD], U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, Biological Control Operations, [1994]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library