State Library of Pennsylvania - Pennsylvania Conservation and Science

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  • Date = 1957

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Items related to the care, management and supervision of natural resources in order to preserve and protect them through prudent management. General and specific topical texts in the natural and industrial sciences, such as paleontology and engineering.
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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.