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  1. By: Lord, Alan
    Type: Article
    In: Palaeontology
    Volume: 14
    Date: 1971
    Page Range: 642--665
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Lord, Alan
    Type: Article
    In: Palaeontology
    Volume: 15
    Date: 1972
    Page Range: 187--196
    Publication Info: London, Palaeontological Association, 1957-