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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Harper, G W
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 80
    Date: 1968
    Page Range: 100--102
    Publication Info: [London s.n
  2. By: Harper, G W
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 81
    Date: 1969
    Page Range: 105--107
    Publication Info: [London s.n