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  1. By: Manceñido, Miguel O - Walley, Christopher D
    Type: Article
    In: Palaeontology
    Volume: 22
    Date: 1979
    Page Range: 317--337
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Baker, Peter G. - Manceñido, Miguel O
    Type: Article
    In: Palaeontology
    Volume: 40
    Date: 1997
    Page Range: 191--200
    Publication Info: London, Palaeontological Association, 1957-