Lesley, J. P. () Historical sketch of geological explorations in Pennsylvania and other states /MLA Citation
Lesley, J. P. Historical Sketch Of Geological Explorations In Pennsylvania And Other States. : . Print.
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Historical sketch of geological explorations in Pennsylvania and other states /
by J.P. Lesley.
|Author:||Lesley, J. P.|
|Published:||Harrisburg : Published by the Board of Commissioners for the Second geological survey, 1876.|
Report of progress (Geological Survey of Pennsylvania) ; A.
|Topics:||Geology - Pennsylvania - History. | Geological surveys - Pennsylvania - History. | Geological Society of Pennsylvania. | Geological Survey of Pennsylvania.|