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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Korringa, P
    Type: Article
    In: Tijdschrift voor entomologie
    Volume: 88
    Date: 1947
    Page Range: 493--498
    Publication Info: [Amsterdam], Nederlandse Entomologische Vereniging,
  2. By: Korringa, P
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series
    Volume: 27
    Series: 4
    Date: 1951
    Page Range: 133--158
    Publication Info: San Francisco California Academy of Sciences