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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ulbricht, Albert,
    Type: Article
    In: Entomologische Rundschau
    Volume: 38
    Date: 1921
    Page Range: 25--26
    Publication Info: Stuttgart, A. Kernen, 1909-
  2. By: Ulbricht, Albert,
    Type: Article
    In: Archiv für Naturgeschichte
    Volume: 86
    Date: 1921
    Page Range: 21--22
    Publication Info: Berlin, Nicolai, 1912-