(1992). Maps showing mineral resource assessment for skarn deposits of gold, silver, copper, tungsten and iron in the Butte 1 ̊x 2 ̊quadrangle, Montana. U.S. Geological Survey.
Chicago-Zitierstil (17. Ausg.)Maps Showing Mineral Resource Assessment for Skarn Deposits of Gold, Silver, Copper, Tungsten and Iron in the Butte 1 ̊x 2 ̊quadrangle, Montana. Reston, VA: U.S. Geological Survey, 1992.
MLA-Zitierstil (9. Ausg.)Maps Showing Mineral Resource Assessment for Skarn Deposits of Gold, Silver, Copper, Tungsten and Iron in the Butte 1 ̊x 2 ̊quadrangle, Montana. U.S. Geological Survey, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.