1894. 2011-12-12T21:38:44Z. 2022-03-29T20:40:50Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Virginia.
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1894. 2013-03-13T13:47:27Z. 2013-03-13T13:47:27Z. Campbell, Marius R. (Marius Robinson), 1858-1940. The Survey. English. Public. Kentucky, Harlan County, Letcher County, Virginia, Lee County, Scott County, Wise County, Tennessee, Hancock County, Hawkins County, and Sullivan County.
1894. 2013-03-15T14:19:00Z. 2013-03-15T14:19:57Z. Campbell, Marius R. (Marius Robinson), 1858-1940. The Survey. English. Public. Kentucky, Harlan County, Letcher County, Virginia, Lee County, Scott County, Wise County, Tennessee, Hancock County, Hawkins County, and Sullivan County.
1894. 2013-03-13T13:49:17Z. 2013-03-14T15:01:35Z. Darton, Nelson Horatio, 1865-1948. U.S. Geological Survey. English. Public. Virginia, Maryland, and Charles County.
1894. 2013-03-13T13:44:14Z. 2013-03-14T14:55:49Z. Keith, Arthur. U.S. Geological Survey. English. Public. Virginia, West Virginia, and Maryland.
1894. 2010-09-10T18:14:53Z. 2020-07-28T17:04:44Z. Rand, McNally & Co. English. Public. Virginia.
1894. 2011-05-31T14:57:40Z. 2015-10-21T15:00:05Z. Geological Survey (U.S.). The Survey. English. Public. Bland County (Va.), Pocahontas Region (Va.), Tazewell County (Va.), Virginia, West Virginia, and Wythe County (Va.).