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  1. By: Gunnell, Gregg F. - Butler, P. M. (Percy Milton), - Greenwood, Marjorie. - Simmons, Nancy B.
    Publication info: New York, NY, American Museum of Natural History, [2015]
    Holding Institution: American Museum of Natural History Library
  1. By: Butler, P. M. (Percy Milton), - Mills, James Richard Ewart
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 4
    Issue: 1
    Date: 1959-04
    Page Range: 1--26
    Publication Info: London, BM(NH),
  2. By: Butler, P. M. (Percy Milton),
    Type: Article
    In: Fossil mammals of Africa
    Volume: 11
    Date: 1956-11-07
    Page Range: 1--75
    Publication Info: London, British Museum (Natural History),
  3. By: Butler, P. M. (Percy Milton),
    Type: Article
    In: Bulletin of the British Museum (Natural History) Geology
    Volume: 10
    Date: 1965
    Page Range: 163--237
    Publication Info: London, BM(NH),
  4. By: Butler, P. M. (Percy Milton), - Hopwood, A Tindell
    Type: Article
    In: Fossil mammals of Africa
    Volume: 13
    Date: 1957-04
    Page Range: 1--35
    Publication Info: London, British Museum (Natural History),
  5. By: Butler, P. M. (Percy Milton),
    Type: Article
    In: Breviora
    Volume: 446
    Date: 1978
    Page Range: 1--27
    Publication Info: Cambridge, Mass Museum of Comparative Zoology, Harvard University [1952-