Technical paper 702 and 707. 707. Minable reserves, petrography, chemical characteristics, and washability tests of coal occurring in Coos Bay coal field, Coos County, Oreg.; by Albert L. Toenges. James J. Dowd, Louis A. Turnbull, J. M. Schopf, H. M. Cooper, R. F. Abernethy, H. F. Yancey, and M. R. Geer.

Tools