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  1. By: Chen, P. S. - Hanimann, F - Briegel, Hans,
    Type: Article
    In: Revue suisse de zoologie
    Volume: 74
    Date: 1967
    Page Range: 570--588
    Publication Info: Genève Kundig [etc.]
  2. By: Chen, P. S. - Hanimann, F - Roeder-Guanella, C
    Type: Article
    In: Revue suisse de zoologie
    Volume: 73
    Date: 1966
    Page Range: 219--228
    Publication Info: Genève Kundig [etc.]