Coal-bearing Upper Pennsylvanian and Lower Permian rocks, Washington area, Pennsylvania /

by Berryhill, Henry L., Jr. (Henry Lee), 1921-2013, Kent, Bion H. (Bion Huntley), 1925-, Schweinfurth, Stanley P.
Washington : United States Department of the Interior, Geological Survey, 1971

Final report presented to h. ex. dr. Lauro Severiano Müller, minister of industry, highways and public works, by I. C. White, chief of the commission.

Rio de Janeiro, Imprensa Nacional, 1908