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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Sparks, Alton N.,
    Publication info: Washington], Agricultural Research Service, U.S. Dept. of Agriculture, 1967
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Sparks, Alton N., - Entomological Society of America - Entomological Society of Canada (1951- ) - United States. Agricultural Research Service.
    Publication info: [Washington, D.C.], U.S. Dept. of Agriculture, Agricultural Research Service, [1986]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library