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  1. By: Jell, John S - Sutherland, Patrick K
    Type: Article
    In: Palaeontology
    Volume: 33
    Date: 1990
    Page Range: 769--821
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Sorauf, J E - Jell, John S
    Type: Article
    In: Palaeontology
    Volume: 20
    Date: 1977
    Page Range: 1--19
    Publication Info: London, Palaeontological Association, 1957-