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  1. By: Witschi, Emil, - Munemitsu, S
    Type: Article
    In: Revue suisse de zoologie
    Volume: 71
    Date: 1964
    Page Range: 287--298
    Publication Info: Genève, Kundig [etc.],
  2. By: Witschi, Emil,
    Type: Article
    In: The Wilson bulletin
    Volume: 47
    Issue: 3
    Date: 1935
    Page Range: 177--188
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-