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 (U.S. Geological Survey bulletin ; 1653)
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