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  1. 1
    Published 1990
    In collection: Published Materials
    Subjects: ';
    Map

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    Coal resources of Cambria and Blair Counties, Pennsylvania
  2. 2
    Author: Sevon, William D.,
    Published 2000
    In collection: Published Materials
    Subjects: '; “...Geomorphology Pennsylvania Maps....”
    Government Document Map

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    Physiographic provinces of Pennsylvania /
  3. 3
    Author: McCoy, Kaycee L.
    Published 2007
    In collection: Published Materials
    Subjects: '; “...Oil fields Pennsylvania Maps....”
    Government Document Map

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    Oil and gas fields of Pennsylvania /

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