Patchen, D. G. (1968). Keefer Sandstone gas development and potential in West Virginia (2d print. with addendum.). West Virginia Geological and Economic Survey.
Chicago Style (17th ed.) CitationPatchen, Douglas G. Keefer Sandstone Gas Development and Potential in West Virginia. 2d print. with addendum. [Morgantown, W. Va.]: West Virginia Geological and Economic Survey, 1968.
MLA (9th ed.) CitationPatchen, Douglas G. Keefer Sandstone Gas Development and Potential in West Virginia. 2d print. with addendum. West Virginia Geological and Economic Survey, 1968.
Warning: These citations may not always be 100% accurate.