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  1. By: Hamann, Otto
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 17
    Series: 5
    Date: 1886
    Page Range: 386--387
    Publication Info: London Taylor and Francis, Ltd
  2. By: Hamann, Otto
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 20
    Series: 5
    Date: 1887
    Page Range: 361--378
    Publication Info: London Taylor and Francis, Ltd