Mineral resource potential and geology of the San Juan National Forest, Colorado / edited by Richard E. Van Loenen and Anthony B. Gibbons ; with a section on salable minerals / by Andrew G. Raby and John S. Dersch.
Imprint
Washington : U.S. G.P.O. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : For sale by U.S. Geological Survey, Information Services, 1997.
