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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Kryger, J P
    Type: Article
    In: Entomologiske meddelelser
    Volume: 10
    Date: 1915
    Page Range: 243--245
    Publication Info: København, Entomologisk forening [etc.],
  2. By: Kryger, J P
    Type: Article
    In: Entomologiske meddelelser
    Volume: 12
    Date: 1919
    Page Range: 257--354
    Publication Info: København, Entomologisk forening [etc.],
  3. By: Kryger, J P
    Type: Article
    In: Entomologiske meddelelser
    Volume: 13
    Date: 1920
    Page Range: 183--188
    Publication Info: København, Entomologisk forening [etc.],
  4. By: Blood, B. N. - Kryger, J P
    Type: Article
    In: The Entomologist's monthly magazine
    Volume: 58
    Series: 3
    Date: 1922
    Page Range: 229--230
    Publication Info: Oxford [etc.] Entomologist's Monthly Magazine Ltd. [etc.]