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  1. A preliminary report on the palaeontology of Perry County, describing the order and thickness of its formations and its folded and faulted structure.
    By: Claypole, Edward Waller,
    Publication info: Harrisburg,Board of commissioners for the Second geological survey,1885.
    Contributed by: Mertz Library, The New York Botanical Garden
    Subjects: Geology  Paleontology  Pennsylvania  Perry County  
    BHL Collections: New York Botanical Garden
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