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. 2012-03-14T14:53:32Z. 2012-03-27T23:59:11Z. Arndt, Harold H. U.S. Geological Survey. English. Public. Pennsylvania, Northumberland County, and Columbia County.
1973. 2012-11-27T19:24:46Z. 2013-03-18T20:47:08Z. Arndt, Harold H. U.S. Geological Survey. English. Public. Pennsylvania, Northumberland County, and Columbia County.