1953. 2018-06-21T20:08:01Z. 2018-06-21T20:08:01Z. Rothrock, Howard Eugene, 1893-. U.S. Dept. of the Interior, Geological Survey. English. cartographic image. Public. Pennsylvania, Northumberland County, Schuylkill County, Northumberland County., and Schuylkill County.
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1951. 2018-06-22T19:01:18Z. 2018-09-05T20:08:55Z. Rothrock, Howard Eugene, 1893-. U.S. Dept. of the Interior, Geological Survey. English. cartographic image. Public. Pennsylvania, Northumberland County, and Northumberland County.
1884. 2012-03-14T13:31:17Z. 2012-07-11T15:16:56Z. Geological Survey of Pennsylvania. Second Geological Survey of Pennsylvania. English. Public. Pennsylvania, Carbon County, Columbia County, Northumberland County, and Schuylkill County.




