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  1. By: Simpson, George Gaylord, - Brown, Barnum, - Scarritt Patagonian Expedition
    Publication info: New York City, The American Museum of Natural History, [1933]
    Holding Institution: American Museum of Natural History Library
    Subjects: 56.9,6:14.71,5  Argentina  Brain  Casts  Hegetotherium mirabile  Litopterna  Mammals, Fossil  Notoungulata  Paleontology  Proterotherium cavum  Protypotherium  Río Gallegos Region  Skull  Ungulates, Fossil
  2. By: Simpson, George Gaylord, - Scarritt Patagonian Expedition
    Publication info: New York City, The American Museum of Natural History, [1932]
    Holding Institution: American Museum of Natural History Library
    Subjects: 56.9,71(1181:82.9)  Argentina  Chubut  Litopterna  Mammals, Fossil  Paleontology  Tertiary  Toxodonta  Typotheria  Ungulates, Fossil
  3. By: Croft, Darin A. - Flynn, John J. (John Joseph), - Wyss, André R.
    Publication info: Chicago, Ill, Field Museum of Natural History, 2004
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Chile  Litopterna  Miocene  Notoungulata  Paleontology  Ungulates, Fossil
  4. By: Cifelli, Richard
    Publication info: New York, N.Y, American Museum of Natural History, c1983
    Holding Institution: American Museum of Natural History Library
    Subjects: Condylarthra  Litopterna  Mammals, Fossil  Paleogene  Paleontology  South America  
  5. By: Cifelli, Richard - Soria, Miguel Fernando
    Publication info: New York, N.Y, American Museum of Natural History, c1983
    Holding Institution: American Museum of Natural History Library
    Subjects: Adianthidae  Litopterna  Mammals, Fossil  Paleontology  South America