1976. 2012-05-07T14:18:31Z. 2012-05-16T15:46:30Z. Johnson, William D., Jr. U.S. Geological Survey. English. Public. Kentucky, Union County, and Henderson County.
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1974. 2012-04-19T19:45:37Z. 2012-05-03T15:40:24Z. Johnson, William D., Jr. U.S. Geological Survey. English. Public. Kentucky, Henderson County, Union County, Indiana, and Posey County.
1975. 2012-05-03T14:37:24Z. 2012-05-09T14:06:20Z. Johnson, William D., Jr. U.S. Geological Survey. English. Public. Kentucky and Union County.