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1993. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Virginia, Appalachian Basin, Colorado, and Front Range (Colo. and Wyo.).
1974. 2012-04-26T14:48:15Z. 2012-05-03T15:42:02Z. Christiansen, Robert L. U.S. Geological Survey. English. Public. Appalachian Basin and Yellowstone National Park.
6. Oil and gas data from Devonian and Silurian rocks in the Appalachian Basin [cartographic material]
1975. 2013-08-27T17:29:06Z. 2013-09-04T19:52:20Z. De Witt, Wallace, Jr., 1920-2012. U.S. Geological Survey. English. Public. Appalachian Basin. Devonian and Silurian.
1978. 2013-08-27T17:41:08Z. 2013-09-04T19:52:21Z. Harris, Anita G. U.S. Geological Survey. English. Public. Appalachian Basin. Paleozoic.
1980. 2013-08-27T17:43:35Z. 2013-09-04T19:52:21Z. Milici, Robert C., 1931-. Dept. of the Interior, U.S. Geological Survey. English. Public. Appalachian Basin.
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.
2008. 2008-11-11T15:36:27Z. 2012-04-26T14:16:08Z. Ryder, Robert T. U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services. English. Public. Appalachian Basin and Appalachian Basin. Cambrian and Ordovician.
