J.L. McCaslin ; Bendix Field Engineering Corporation, Grand Junction Operations ; prepared for th..., At head of cover title: National Uranium Resource Evaluation., Six microfiches in pocket., "February 1981.", "May 1981"--Cover., Contract no. DE-AC13-76GJ01664.
by Karl E. Karlstrom [and others] ; University of Wyoming ; prepared by the U.S. Department of En..., At head of cover title: National Uranium Resource Evaluation., Two maps on folded sheets in pocket., "February, 1981."