Team, U. S. G. S. N. M. R. A. (2000). 1998 assessment of undiscovered deposits of gold, silver, copper, lead, and zinc in the United States. US Geological Survey circular 1178.
Chicago Style CitationTeam, United States Geological Survey National Mineral Resource Assessment. "1998 Assessment of Undiscovered Deposits of Gold, Silver, Copper, Lead, and Zinc in the United States." US Geological Survey Circular 1178 2000.
MLA CitationTeam, United States Geological Survey National Mineral Resource Assessment. "1998 Assessment of Undiscovered Deposits of Gold, Silver, Copper, Lead, and Zinc in the United States." US Geological Survey Circular 1178 2000.
Warning: These citations may not always be 100% accurate.