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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Denison, Robert H. (Robert Howland),
    Publication info: [Chicago], Field Museum Press, 1968
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Devonian  Idaho  Lungfishes  Lungfishes, Fossil  Paleontology  Utah  Wyoming
  2. By: Denison, Robert H. (Robert Howland),
    Publication info: [Chicago], Field Museum of Natural History, 1969
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Illinois  Lungfishes, Fossil  Paleontology  Pennsylvanian
  3. By: Denison, Robert H. (Robert Howland),
    Publication info: Chicago, Field Museum of Natural History, 1974
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Lungfishes, Fossil  Teeth, Fossil