1966. 2012-01-03T15:27:09Z. 2012-03-05T17:27:49Z. Palmer, James Edward. U.S. Geological Survey. English. Public. Kentucky, Caldwell County, Crittenden County, and Hopkins County.
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1968. 2012-02-20T19:22:06Z. 2012-03-06T15:51:58Z. Palmer, James Edward. U.S. Geological Survey. English. Public. Kentucky, Hopkins County, and Christian County.
1967. 2012-01-23T18:27:57Z. 2012-03-05T17:35:19Z. Palmer, James Edward. U.S. Geological Survey. English. Public. Kentucky, Hopkins County, and Christian County.