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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Feldtschenko, Boris
    Type: Article
    In: Entomologische Nachrichten
    Volume: 17
    Date: 1891
    Page Range: 177--188
    Publication Info: Berlin [etc.], R. Friedländer [etc.],
  2. By: Feldtschenko, Boris
    Type: Article
    In: Entomologische Nachrichten
    Volume: 17
    Date: 1891
    Page Range: 194--206
    Publication Info: Berlin [etc.], R. Friedländer [etc.],