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1986. 2018-05-29T19:35:47Z. 2018-05-29T19:35:47Z. Cardwell, Dudley H., cartographer. West Virginia Geological and Economic Survey. English. cartographic image. Public. West Virginia and West Virginia.
1976. 2018-05-29T18:42:35Z. 2018-05-29T18:42:35Z. Cardwell, Dudley H., cartographer. West Virginia Geological and Economic Survey. English. cartographic image. Public. West Virginia and West Virginia.
2006. 2012-01-13T19:48:51Z. 2012-03-05T17:33:06Z. Ryder, Robert T. U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services. English. Public. Appalachian Basin, Ohio, West Virginia, Appalachian Basin., Ohio., and West Virginia. Silurian.