(1992). Maps showing locations of mines and prospects in the Butte 1 ̊x 2 quadrangle, Western Montana. U.S. Geological Survey.
Chicago-Zitierstil (17. Ausg.)Maps Showing Locations of Mines and Prospects in the Butte 1 ̊x 2 Quadrangle, Western Montana. Reston, VA: U.S. Geological Survey, 1992.
MLA-Zitierstil (9. Ausg.)Maps Showing Locations of Mines and Prospects in the Butte 1 ̊x 2 Quadrangle, Western Montana. U.S. Geological Survey, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.