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  1. By: Cooper, G. Arthur (Gustav Arthur),
    Publication info: 1966
    Holding Institution: Smithsonian Institution Archives
    Subjects: Cedar Valley  Center Point  Ely  Field notes  Geology  Iowa  Mason City  Paleontology  Slides (photographs)  United States  
    BHL Collections: Smithsonian Field Books collection
  2. By: Cooper, G. Arthur (Gustav Arthur),
    Publication info: 1966
    Holding Institution: Smithsonian Institution Archives
    Subjects: Brussels  Cedar Valley  Field notes  Geology  Marshall  Missouri  Paleontology  Slides (photographs)  United States  
    BHL Collections: Smithsonian Field Books collection