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  1. By: Plessis, Y
    Type: Article
    In: Bulletin du Muséum national d'histoire naturelle
    Volume: 40
    Series: 2
    Issue: 6
    Date: 1968-01-02
    Page Range: 1232--1236
    Publication Info: Paris, Imprimerie nationale, 1907-1971
  2. By: Plessis, Y - Fourmanoir, P
    Type: Article
    In: Bulletin du Muséum national d'histoire naturelle
    Volume: 37
    Series: 2
    Issue: 5
    Date: 1965
    Page Range: 764--765
    Publication Info: Paris, Imprimerie nationale, 1907-1971
  3. By: Plessis, Y
    Type: Article
    In: Bulletin du Muséum national d'histoire naturelle
    Volume: 28
    Series: 2
    Issue: 4
    Date: 1956-06
    Page Range: 433--434
    Publication Info: Paris, Imprimerie nationale, 1907-1971