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  1. By: Campbell, Roy E. (Roy Elliott),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1920
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Campbell, Roy E. (Roy Elliott),
    Publication info: Wash, 1921
    Holding Institution: Library of Congress
  1. By: Campbell, Roy E. (Roy Elliott),
    Type: Article
    In: The Pan-Pacific entomologist
    Volume: 4
    Date: 1927
    Page Range: 77--84
    Publication Info: San Francisco, Pacific Coast Entomological Society,
  2. By: Campbell, Roy E. (Roy Elliott),
    Type: Article
    In: Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia
    Volume: 25
    Date: 1914
    Page Range: 222--224
    Publication Info: Philadelphia, [Entomological Rooms of the Academy of Natural Sciences],