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  1. By: Walton, Derek - Curry, Gordon B.
    Type: Article
    In: Palaeontology
    Volume: 34
    Date: 1991
    Page Range: 851--858
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Walton, Derek - Cusack, Maggie - Curry, Gordon B.
    Type: Article
    In: Palaeontology
    Volume: 36
    Date: 1993
    Page Range: 883--896
    Publication Info: London, Palaeontological Association, 1957-
  3. By: Walton, Derek
    Type: Article
    In: Palaeontology
    Volume: 41
    Date: 1998
    Page Range: 753--770
    Publication Info: London, Palaeontological Association, 1957-