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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Willis, Harold L.
    Type: Article
    In: The University of Kansas science bulletin
    Volume: 47
    Issue: 5
    Date: 1967-10-11
    Page Range: 145--313
    Publication Info: [Lawrence], University of Kansas, [1926-1996]
  2. By: Willis, Harold L.
    Type: Article
    In: Entomological news
    Volume: 93
    Date: 1982
    Page Range: 51--53
    Publication Info: [Philadelphia], American Entomological Society, 1925-