Mineral resource potential and geology of the San Juan National Forest, Colorado /
Van Loenen, Richard E.
Gibbons, Anthony B.
Washington : U.S. G.P.O. ; Denver, CO : For sale by the U.S. Geological Survey, Informations Services,
1997.
Includes four plates on two folded pieces in pockets.
Includes bibliographical references (p. 132-138).
Mines and mineral resources