1978. 2012-06-13T20:00:39Z. 2012-06-20T14:08:04Z. Hansen, Dan E. U.S. Geological Survey. English. Public. Kentucky, McLean County, and Muhlenberg County.
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1978. 2013-11-18T19:18:20Z. 2014-01-22T23:56:26Z. Hansen, Dan E. The Survey. English. Public. Utah, Kaiparowits Plateau, and U.S.
1978. 2013-11-18T19:34:02Z. 2014-01-22T23:56:28Z. Hansen, Dan E. The Survey. English. Public. Utah and Kaiparowits Plateau.