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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Hanson, John F.
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 42
    Date: 1940
    Page Range: 147--150
    Publication Info: Washington, etc, Entomological Society of Washington,
  2. By: Hanson, John F.
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 45
    Date: 1943
    Page Range: 85--88
    Publication Info: Washington, etc, Entomological Society of Washington,