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  1. By: Clarke, Jane B - Barker, Michael J.
    Type: Article
    In: Palaeontology
    Volume: 38
    Date: 1995
    Page Range: 905--914
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Barker, Michael J. - Munt, Martin C - Radley, Jon D
    Type: Article
    In: Palaeontology
    Volume: 40
    Date: 1997
    Page Range: 955--963
    Publication Info: London, Palaeontological Association, 1957-