1978. 2012-06-20T13:31:45Z. 2012-06-29T20:46:11Z. Johnson, William D., Jr. U.S. Geological Survey. English. Public. Kentucky, Grayson County, Breckenridge County, and Hardin County.
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1978. 2012-06-19T15:23:54Z. 2012-06-29T20:45:55Z. Johnson, William D., Jr. U.S. Geological Survey. English. Public. Kentucky, Grayson County, and Breckenridge County.