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  1. The paleoecological history of two Pennsylvanian black shales / Rainer Zangerl and Eugene S. Richardson, Jr. ; with contributions by Bertram G. Woodland...[et al.].
    By: Zangerl, Rainer, - Richardson, Eugene Stanley,
    Publication info: Chicago :Chicago Natural History Museum,1963.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Paléoécologie  Paleoecology  Paleontologie  Paleontology  Pennsylvanian  Pennsylvanien  
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