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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ray, C H - Williams, Michael L.
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 85
    Date: 1983
    Page Range: 161--173
    Publication Info: Washington, etc, Entomological Society of Washington,
  2. By: Ray, C H - Williams, Michael L.
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 83
    Date: 1981
    Page Range: 230--244
    Publication Info: Washington, etc, Entomological Society of Washington,
  3. By: Ray, C H - Williams, Michael L.
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 93
    Date: 1991
    Page Range: 186--192
    Publication Info: Washington, etc, Entomological Society of Washington,