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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Bartels, M.
    Type: Article
    In: Revue suisse de zoologie
    Volume: 38
    Date: 1931
    Page Range: 1--30
    Publication Info: Genève, Kundig [etc.],
  2. By: Bartels, M.
    Type: Article
    In: Revue suisse de zoologie
    Volume: 37
    Date: 1930
    Page Range: 1--42
    Publication Info: Genève, Kundig [etc.],