1998 assessment of undiscovered deposits of gold, silver, copper, lead, and zinc in the United States - U.S. Geological Survey National Mineral Resource Assessment Team. (Washington : U.S. G.P.O. ; Denver, CO : Free on application to U.S. Geological Survey, Information Services, 1999)
Includes bibliographical references.
System requirements for accompanying computer disc: Windows 95/98/NT.
Keywords: Mines and mineral resources -- United States; Ore-deposits -- United States