Proceedings of the seventh annual Appalachian petroleum geology symposium :
Devonian shale--production and potential /
sponsored by the West Virginia Geological & Economic Survey, the West Virginia University Department of Geology & Geography, and the United States Energy Research & Development Administration, Morgantown Energy Research Center, March 1-4, 1976, edited by R.C. Shumaker [and] W.K. Overbey.

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