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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Bates, Denis Edwin Beeching
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 16
    Date: 1968
    Page Range: 125--199
    Publication Info: London, BM(NH),
  2. By: Bates, Denis Edwin Beeching
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 18
    Date: 1969
    Page Range: 1--28
    Publication Info: London, BM(NH),