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  1. By: Bolt, John R.,
    Publication info: Chicago, Field Museum of Natural History, 1974
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Skull  Trematopsidae
  2. By: Bolt, John R.,
    Publication info: Chicago, Field Museum of Natural History, 1974
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Comanche County  Oklahoma  Paleontology  Permian  Trematopsidae