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  1. By: Mitchell, Charles E
    Type: Article
    In: Palaeontology
    Volume: 30
    Date: 1987
    Page Range: 353--405
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Mitchell, Charles E - Carle, Karen J
    Type: Article
    In: Palaeontology
    Volume: 29
    Date: 1986
    Page Range: 373--390
    Publication Info: London, Palaeontological Association, 1957-