@misc{indiciae8edc1b420264,
  title = {Maps showing locations of mines and prospects in the Butte 1° x 2° quadrangle, western Montana},
  author = {J. E. Elliott and J. S. Loen and K. K. Wise and M. J. Blaskowski},
  year = {1992},
  doi = {10.3133/i2050c},
  url = {https://pubs.usgs.gov/publication/i2050C},
  note = {Source identifier: i2050C}
}