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- The "Clinton" sands in Canton, Dover, Massillon, and Navarre quadrangles, Ohio, by James F. Pepper, Wallace de Witt, Jr., and Gail M. Everhart
- Nodules of diagenetic barite in Upper Devonian shales of western New York, by James F. Pepper, Sandra H.B. Clark, and Wallace de Witt, Jr
- Nodules of diagenetic barite in Upper Devonian shales of western New York, by James F. Pepper, Sandra H.B. Clark, and Wallace de Witt, Jr
- Geology of the Bedford shale and Berea sandstone in the Appalachian basin, by James F. Pepper, Wallace De Witt, Jr., and David F. Demarest
- The "Clinton" sands in Canton, Dover, Massillon, and Navarre quadrangles, Ohio, by James F. Pepper, Wallace de Witt, Jr., and Gail M. Everhart
- Nodules of diagenetic barite in Upper Devonian shales of western New York, by James F. Pepper, Sandra H.B. Clark, and Wallace de Witt, Jr
- Geology of the Bedford shale and Berea sandstone in the Appalachian basin, by James F. Pepper, Wallace De Witt, Jr., and David F. Demarest