Geology of the west-central part of the southern anthracite field and adjoining areas, Pennsylvania - Wood, Gordon H. (Gordon Harry), 1919-; Trexler, J. Peter, 1926-; Kehn, Thomas M. (Washington, U.S. Govt. Print. Off., 1969)
Part of illustrative matter fold. in pocket.
Bibliography: p. 139-143.
Keywords: Geology -- Pennsylvania; Anthracite coal -- Pennsylvania