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  1. By: Norman, Canon
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 12
    Series: 6
    Date: 1893
    Page Range: 441--452
    Publication Info: London Taylor and Francis, Ltd
  2. By: Norman, Canon
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 5
    Series: 7
    Date: 1900
    Page Range: 126--144
    Publication Info: London Taylor and Francis, Ltd