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  1. By: Heynemann, D F
    Type: Article
    In: Malakozoologische Blätter
    Volume: 10
    Date: 1862
    Page Range: 200--216
    Publication Info: Cassel, T. Fischer, 1854-1891
  2. By: Heynemann, D F
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 11
    Series: 4
    Date: 1873
    Page Range: 271--275
    Publication Info: London Taylor and Francis, Ltd