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  1. By: Harris, Thomas Maxwell
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 5
    Issue: 6
    Date: 1961-07-14
    Page Range: 159--174
    Publication Info: London, BM(NH),
  2. By: Harris, Thomas Maxwell
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 33
    Issue: 5
    Date: 1980-03-27
    Page Range: 295--311
    Publication Info: London, BM(NH),