1973. 2012-03-30T18:01:11Z. 2012-05-03T15:34:47Z. Froelich, A. J. (Albert Joseph), 1929-. U.S. Geological Survey. English. Public. Kentucky, Harlan County, and Letcher County.
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1973. 2012-04-13T15:42:16Z. 2012-04-16T15:59:12Z. Rice, Charles L. U.S. Geological Survey. English. Public. Kentucky, Letcher County, Pike County, Virginia, and Wise County.
1973. 2012-03-30T18:06:14Z. 2012-05-03T15:34:48Z. Geological Survey (U.S.). The Survey. English. Public. Kentucky, Harlan County, Letcher County, and Perry County.
1973. 2012-04-13T14:45:54Z. 2021-09-27T17:29:27Z. Rice, Charles L. U.S. Geological Survey. English. Public. Kentucky, Letcher County, Virginia, and Wise County.