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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Parker, William B. (William Bell),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Parker, William B. (William Bell),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1913
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Parker, William B. (William Bell),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1914
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Parker, William B. (William Bell),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1913
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  5. By: Parker, William B. (William Bell),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1913
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library