1971. 2012-03-14T14:47:40Z. 2012-03-27T23:59:11Z. Arndt, Harold H. U.S. Geological Survey. English. Public. Pennsylvania, Columbia County, and Schuylkill County.
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1971. 2012-03-13T14:07:19Z. 2012-03-27T23:58:50Z. Alvord, Donald C. (Donald Clayton), 1922-. The Survey. English. Public. Pennsylvania, Pike County, Monroe County, New Jersey, and Warren County.
1971. 2012-11-07T21:31:25Z. 2012-11-07T21:31:25Z. Kent, Bion H. (Bion Huntley), 1925-. The Survey. English. Public. Pennsylvania and Greene County.
1971. 2012-03-14T14:53:32Z. 2012-03-27T23:59:11Z. Arndt, Harold H. U.S. Geological Survey. English. Public. Pennsylvania, Northumberland County, and Columbia County.
1971. 2009-11-18T17:02:10Z. 2011-03-28T22:50:28Z. Rand McNally and Company. Mobil. English. Public. Pennsylvania.