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  1. By: De Block, M
    Type: Article
    In: Revue suisse de zoologie
    Volume: 8
    Issue: 2
    Date: 1900
    Page Range: 107--166
    Publication Info: Genève, Kundig [etc.],
  2. By: De Block, M
    Type: Article
    In: Revue suisse de zoologie
    Volume: 9
    Date: 1901
    Page Range: 1--41
    Publication Info: Genève, Kundig [etc.],