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  1. By: Zangerl, Rainer, - Richardson, Eugene S., (Eugene Stanley), Jr.
    Publication info: Chicago, Chicago Natural History Museum, 1963
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Paléoécologie  Paleoecology  Paleontologie  Paleontology  Pennsylvanian  Pennsylvanien