1981. 2015-06-23T19:16:19Z. 2015-07-07T22:09:36Z. Wood, Gordon H. (Gordon Harry), 1919-. The Survey. English. cartographic image. Public. Pennsylvania and Carbon County.
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1972. 2012-11-09T20:30:09Z. 2023-02-09T21:27:14Z. Wood, Gordon H. (Gordon Harry), 1919-. The Survey. English. Public. Pennsylvania and Schuylkill County.
3. Geologic map of the Orwigsburg quadrangle, Schuylkill County, Pennsylvania [cartographic material]
1973. 2012-03-28T20:09:51Z. 2012-05-03T15:33:55Z. Wood, Gordon H. (Gordon Harry), 1919-. The Survey. English. Public. Pennsylvania and Schuylkill County.
1969. 2012-02-22T16:01:07Z. 2012-02-22T16:01:07Z. Wood, Gordon H. (Gordon Harry), 1919-. The Survey. English. Public. Pennsylvania and Schuylkill County.
1968. 2012-10-09T17:15:27Z. 2013-03-18T22:22:35Z. Wood, Gordon H. (Gordon Harry), 1919-. The Survey. English. Public. Pennsylvania and Schuylkill County.
