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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Gerdes, Charles Frederick,
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 86
    Date: 1984
    Page Range: 400--410
    Publication Info: Washington, etc, Entomological Society of Washington,
  2. By: Gerdes, Charles Frederick,
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 82
    Date: 1980
    Page Range: 171--177
    Publication Info: Washington, etc, Entomological Society of Washington,
  3. By: Gerdes, Charles Frederick,
    Type: Article
    In: Entomological news
    Volume: 85
    Date: 1974
    Page Range: 279--283
    Publication Info: [Philadelphia], American Entomological Society, 1925-
  4. By: Gerdes, Charles Frederick,
    Type: Article
    In: Entomological news
    Volume: 86
    Date: 1975
    Page Range: 13--22
    Publication Info: [Philadelphia], American Entomological Society, 1925-
  5. By: Gerdes, Charles Frederick,
    Type: Article
    In: Entomological news
    Volume: 90
    Date: 1979
    Page Range: 236--238
    Publication Info: [Philadelphia], American Entomological Society, 1925-
  6. By: Gerdes, Charles Frederick,
    Type: Article
    In: Entomological news
    Volume: 88
    Date: 1977
    Page Range: 271--279
    Publication Info: [Philadelphia], American Entomological Society, 1925-