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  1. By: Patterson, Bryan,
    Publication info: Chicago, Field Museum of Natural History, 1934
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: 1922-1924  Captain Marshall Field paleontological expedition  Paleontology  Pliocene  Pseudotypotherium
  2. By: Patterson, Bryan,
    Publication info: Chicago, 1936
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: 1922-1924  Captain Marshall Field paleontological expeditions  Ear