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