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  1. By: Lespérance, Pierre Jacques, - Sheehan, P M
    Type: Article
    In: Palaeontology
    Volume: 19
    Date: 1976
    Page Range: 719--731
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Lespérance, Pierre Jacques,
    Type: Article
    In: Palaeontology
    Volume: 33
    Date: 1990
    Page Range: 209--224
    Publication Info: London, Palaeontological Association, 1957-
  3. By: Lespérance, Pierre Jacques,
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 43
    Date: 1988-04-28
    Page Range: 239--245
    Publication Info: London, BM(NH),
  4. By: Lespérance, Pierre Jacques,
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 43
    Date: 1988
    Page Range: 359--376
    Publication Info: London, BM(NH),