1977. 2012-06-04T17:49:14Z. 2012-06-13T15:03:54Z. Danilchik, Walter. U.S. Geological Survey. English. Public. Kentucky, Magoffin County, Knott County, Floyd County, and U.S.
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1977. 2012-06-05T14:26:53Z. 2012-06-13T15:04:19Z. Danilchik, Walter. U.S Geological Survey. English. Public. Kentucky, Breathitt County, Knott County, Magoffin County, and U.S.
1965. 2011-12-16T20:41:10Z. 2012-03-05T17:25:34Z. Geological Survey (U.S.). The Survey. English. Public. Kentucky, Knott County, Perry County, and U.S.