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  1. By: Guth, Chr
    Type: Article
    In: Bulletin du Muséum national d'histoire naturelle
    Volume: 33
    Series: 2
    Issue: 1
    Date: 1961-01
    Page Range: 79--83
    Publication Info: Paris Imprimerie nationale 1907-1971
  2. By: Guth, Chr
    Type: Article
    In: Bulletin du Muséum national d'histoire naturelle
    Volume: 32
    Series: 2
    Issue: 6
    Date: 1961-04-15
    Page Range: 473--483
    Publication Info: Paris Imprimerie nationale 1907-1971