Carbonizing Properties and Petrographic Composition of Upper Freeport Coal from Morgantown District, Monongalia County, W. Va: And of Lower Freeport Coal from Eastern Indiana County, Near Cambria County, Pa
Arno Carl Fieldner · Joseph Dana Davis · Walter Alfred Selvig · Dewey A. Reynolds · Ralph Emmet Brewer · George C. Sprunk · Clarence Raymond Holmes
Jan 1941 · U.S. Department of the Interior, Bureau of Mines