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  1. By: Hubendick, B - Waldén, Henrik W.
    Type: Article
    In: The Bulletin of zoological nomenclature
    Volume: 21
    Date: 1964
    Page Range: 435
    Publication Info: London International Trust for Zoological Nomenclature
  2. By: Waldén, Henrik W.
    Type: Article
    In: The Bulletin of zoological nomenclature
    Volume: 25
    Date: 1968
    Page Range: 41--49
    Publication Info: London International Trust for Zoological Nomenclature