1972. 2012-02-28T14:58:26Z. 2015-10-21T15:30:45Z. Geological Survey (U.S.). The Survey. English. Public. Pennsylvania.
Search Results
1972. 2012-11-16T19:36:37Z. 2012-11-16T19:36:37Z. Patterson, E. D. (Elmer Davisson). U.S. Geological Survey. English. Public. Pennsylvania and Clarion County.
1972. 2012-11-09T21:32:22Z. 2012-11-09T21:32:22Z. Wood, Gordon H. (Gordon Harry), 1919-. U.S. Geological Survey. English. Public. Pennsylvania and Schuylkill County.
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.
1972. 2012-11-13T20:49:29Z. 2012-11-13T20:49:29Z. Roen, John B. The Survey. English. Public. Pennsylvania and Greene County.
1972. 2012-03-26T13:55:58Z. 2012-05-03T15:31:54Z. Kent, Bion H. (Bion Huntley), 1925-. Geological Survey. English. Public. Pennsylvania, Washington County, and Greene County.
1972. 2012-07-06T16:59:05Z. 2012-07-11T15:22:24Z. Geological Survey (U.S.). The Survey. English. Public. Pennsylvania, Maryland, and Littlestown (Pa.).
1972. 2012-07-06T17:45:26Z. 2022-07-15T21:37:21Z. Geological Survey (U.S.). The Survey. English. Public. Maryland and Pennsylvania.
1972. 2012-07-06T17:55:30Z. 2022-07-15T21:38:35Z. Geological Survey (U.S.). The Survey. English. Public. Maryland and Pennsylvania.
10. Newark West quadrangle, Maryland--Delaware--Pennsylvania, 1953 : 7.5 minute series (topographic)
1972. 2012-07-03T20:04:23Z. 2022-07-05T16:57:43Z. Geological Survey (U.S.). The Survey. English. Public. Maryland, Delaware, and Pennsylvania.
