1891. 2011-05-23T19:47:53Z. 2016-06-03T19:24:08Z. Geological Survey (U.S.). U.S. Dept. of the Interior, Geological Survey. English. Public. Breathitt County (Ky.), Kentucky, Knott County (Ky.), Leslie County (Ky.), Letcher County (Ky.), and Perry County (Ky.).
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