State Library of Pennsylvania - County Histories

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  • Subject = Geology -- Pennsylvania -- Maps ; Geology, Stratigraphic -- Devonian

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A collection of Pennsylvania county, township and borough histories. Includes atlases and plat maps of the state, county, townships, cities, and boroughs.
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Preliminary report on a regional stratigraphic study of Devonian rocks of Pennsylvania / by Thomas H. Jones and Addison S. Ca
Preliminary report on a regional stratigraphic study of Devonian rocks of Pennsylvania / by Thomas H. Jones and Addison S. Ca
Geology -- Pennsylvania -- Maps ; Geology, Stratigraphic -- Devonian
Stratigraphic and paleontologic data of the Devonian rocks in the outcrop belt of Pennsylvania.