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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Francis, Jane E
    Type: Article
    In: Palaeontology
    Volume: 26
    Date: 1983
    Page Range: 277--294
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Francis, Jane E
    Type: Article
    In: Palaeontology
    Volume: 29
    Date: 1986
    Page Range: 665--684
    Publication Info: London, Palaeontological Association, 1957-