Coal exploration proceedings of the first International Coal Exploration Symposium, London, England, May 18-21, 1976 - Muir, William L. G.; Argall, George Oates (San Francisco M. Freeman Publications, 1976)
Proceedings of the second International Coal Exploration Symposium, Denver, Colorado, USA, October 1978, edited by George O. Argall, Jr.
Includes bibliographical references and indexes.
Keywords: Prospecting -- Congresses; Coal -- Congresses