Mineral resources of the Gibraltar Mountain and Planet Peak wilderness study areas, La Paz County, Arizona /
Eppinger, R. G.
Washington : U.S. G.P.O. ; Denver, CO : For sale by the Books and Open-File Reports Section, U.S. Geological Survey,
1990.
Includes bibliographical references (p. 26-28).
Mines and mineral resources
Mines and mineral resources