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  1. The paleoecological history of two Pennsylvanian black shales /
    By: Zangerl, Rainer, - Richardson, Eugene Stanley,
    Publication info: Chicago :Chicago Natural History Museum,1963.
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Paléoécologie  Paleoecology  Paleontologie  Paleontology  Pennsylvanian  Pennsylvanien  
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