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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Laing, J F
    Type: Article
    In: Palaeontology
    Volume: 18
    Date: 1975
    Page Range: 775--808
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Laing, J F
    Type: Article
    In: Palaeontology
    Volume: 17
    Date: 1974
    Page Range: 435--436
    Publication Info: London, Palaeontological Association, 1957-