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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Longbottom, A E
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 32
    Date: 1979
    Page Range: 57--70
    Publication Info: London, BM(NH),
  2. By: Longbottom, A E
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 38
    Date: 1984
    Page Range: 1--26
    Publication Info: London, BM(NH),