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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Beck, Herbert,
    Type: Article
    In: Nota lepidopterologica
    Volume: 15
    Date: 1992
    Page Range: 3--28
    Publication Info: Bonn,
  2. By: Beck, Herbert, - Hacker, Hermann H.,
    Type: Article
    In: Mitteilungen der Münchner Entomologischen Gesellschaft
    Volume: 73
    Date: 1983
    Page Range: 1--14
    Publication Info: München, Münchner Entomologische Gesellschaft,