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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1907. 2013-03-14T15:59:12Z. 2013-03-14T15:59:12Z. Clapp, Frederick G. (Frederick Gardner), 1879-1944. The Survey. English. Public. Pennsylvania, Greene County, Washington County, États-Unis, and Pennsylvanie.
1913. 2013-03-14T18:59:25Z. 2013-03-14T18:59:25Z. Campbell, Marius R. (Marius Robinson), 1858-1940. The Survey. English. Public. Pennsylvania, Blair County, Cambria County, Clearfield County, Indiana County, États-Unis, and Pennsylvanie.
1905. 2013-03-14T15:33:38Z. 2013-03-14T15:33:38Z. Woolsey, Lester Hood, 1877-1961. The Survey. English. Public. Pennsylvania, Allegheny County, Beaver County, États-Unis, and arizona.
1993. 2002-06-01T04:00:00Z. 2012-07-16T18:05:44Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Pennsylvania, Lehigh County, and Berks County.
1973. 2012-12-10T20:49:26Z. 2013-03-18T22:30:59Z. Bergin, M. J. (Marion Joseph), 1927-. Interior--Geological Survey. English. Public. Pennsylvania and Luzerne County.
1903. 2013-03-13T20:11:35Z. 2013-03-13T20:11:35Z. Campbell, Marius R. (Marius Robinson), 1858-1940. The Survey. English. Public. Pennsylvania, Allegheny County, Fayette County, Washington County, Westmoreland County, États-Unis, and Pennsylvanie.
1911. 2013-03-14T18:13:26Z. 2021-09-22T17:59:06Z. Shaw, E. W. (Eugene Wesley), 1881-1935. The Survey. English. Public. Pennsylvania, Allegheny County, Beaver County, and Washington County.
1912. 2013-03-14T18:31:42Z. 2013-03-14T18:31:42Z. Munn, M. J. (Malcolm John), 1874-1949. The Survey. English. Public. Pennsylvania, Greene County, and Washington County.
1932. 2013-03-15T13:32:13Z. 2013-03-15T13:32:13Z. Bascom, F. (Florence), 1862-1945. The Survey. English. Public. Pennsylvania, Chester County, Delaware County, Lancaster County, Delaware, New Castle County, États-Unis, and Pennsylvanie.
