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  1. By: Cox, C. Barry (Christopher Barry), - Hutchinson, P
    Type: Article
    In: Palaeontology
    Volume: 34
    Date: 1991
    Page Range: 561--573
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Hutchinson, P
    Type: Article
    In: Breviora
    Volume: 398
    Date: 1973
    Page Range: 1--24
    Publication Info: Cambridge, Mass Museum of Comparative Zoology, Harvard University [1952-