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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Mortimer, M G - Chaloner, W. G. (William Gilbert)
    Type: Article
    In: Palaeontology
    Volume: 10
    Date: 1967
    Page Range: 706--706
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Mortimer, M G - Chaloner, W. G. (William Gilbert)
    Type: Article
    In: Palaeontology
    Volume: 10
    Date: 1967
    Page Range: 189--213
    Publication Info: London, Palaeontological Association, 1957-