1908. 2013-03-14T16:44:03Z. 2013-03-14T16:44:03Z. Martin, G. C. (George Curtis), 1875-1943. The Survey. English. Public. Maryland, Allegany County, Garrett County, Pennsylvania, Fayette County, Somerset County, West Virginia, Preston County, États-Unis, Pennsylvanie, and Virginie-occidentale.
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1908. 2011-12-12T21:36:13Z. 2022-03-29T20:40:33Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Pennsylvania.
1908. 2011-12-12T21:36:14Z. 2022-03-29T20:40:33Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Pennsylvania.
1908. 2011-12-12T21:36:21Z. 2022-03-29T20:40:34Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Pennsylvania.
1908. 2011-12-12T21:36:24Z. 2022-03-29T20:40:34Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Pennsylvania.
1908. 2011-12-12T21:36:28Z. 2022-03-29T20:40:34Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Pennsylvania.
1908. 2018-08-24T15:19:25Z. 2018-08-24T15:19:25Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Philadelphia Region (Pa.), Pennsylvania, and Philadelphia Region.
1908. 2011-12-12T21:33:47Z. 2022-03-29T20:40:15Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. New Jersey, New York, and Pennsylvania.
1908. 2011-12-12T21:36:34Z. 2022-03-29T20:40:35Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Pennsylvania.
10. Shenango, Penn
1908. 2011-12-12T21:36:35Z. 2022-03-29T20:40:35Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Pennsylvania.