1975. 2008-10-28T12:53:06Z. 2011-03-28T20:38:34Z. Mohr, David W. North Carolina Dept. of Natural and Economic Resources, Division of Planning and Evaluation, Mineral Resources Section. English. Public. North Carolina and Swain County.
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1975. 2012-11-15T16:47:25Z. 2012-11-15T16:47:25Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. North Carolina and Virginia.
1975. 2008-10-23T14:43:30Z. 2011-03-28T23:35:06Z. Wilson, William F. Division of Resource Planning and Evaluation, Mineral Resources Section, North Carolina Dept. of Natural and Economic Resources. English. Public. North Carolina and Orange County.
1975. 2013-08-20T14:53:50Z. 2014-09-09T22:09:49Z. Stromquist, Arvid A. U.S. Geological Survey. English. Public. North Carolina, Rowan County, and Davidson County.