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  1. Enomoto, Catherine B. [Other] ; United States Geological Survey

    Geochemical and mineralogical sampling of the devonian shales in the Broadtop Synclinorium, Appalachian Basin, in Virginia, West Virginia, Maryland, and Pennsylvania

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    Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2015

    Published in: United States Geological Survey: Open-file report ; 2015,1061

  2. Kirschbaum, Mark A. [Other]

    Assessment of undiscovered oil and gas resources of the Ordovician Utica Shale of the Appalachian Basin Province, 2012

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    Reston, Va.: U. S. Department of the Interior, U.S. Geological Survey, 2012

    Published in: United States Geological Survey: USGS fact sheets ; 2012,3116