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  1. By: Baur, Georg, - Case, E. C. (Ermine Cowles), - American Philosophical Society.
    Publication info: Philadelphia, The Society, 1899
    Holding Institution: Smithsonian Libraries and Archives
    Subjects: Paleontology  Pelycosauria  Permian  
  2. By: Case, E. C. (Ermine Cowles),
    Publication info: Washington, D.C, Carnegie Institution of Washington, 1907
    Holding Institution: University of British Columbia Library
    Subjects: Pelycosauria  
    BHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection
  3. By: Cope, E. D. (Edward Drinker),
    Publication info: [Washington, 1885]
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    Subjects: Columella auris  Pelycosauria  Reptiles, Fossil  
    BHL Collections: Bone Wars Collection