1963. 2011-12-12T21:36:59Z. 2022-03-29T20:40:40Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Kentucky and Tennessee.
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1963. 2011-06-02T15:16:21Z. 2011-06-02T15:16:21Z. Geological Survey (U.S.). The Survey. English. Public. Kentucky and Hardin County.