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  1. By: Portmann, A
    Type: Article
    In: Revue suisse de zoologie
    Volume: 59
    Date: 1952
    Page Range: 288--293
    Publication Info: Genève Kundig [etc.]
  2. By: Portmann, A
    Type: Article
    In: Revue suisse de zoologie
    Volume: 55
    Date: 1948
    Page Range: 257--260
    Publication Info: Genève Kundig [etc.]
  3. By: Portmann, A - Gerber, A
    Type: Article
    In: Revue suisse de zoologie
    Volume: 41
    Date: 1934
    Page Range: 365--366
    Publication Info: Genève Kundig [etc.]