@misc{indiciae26100f5bb091,
  title = {Map showing the location of productive lode and placer gold mines in Montana},
  author = {David Frishman and J. E. Elliot and E.E. Foord and R. C. Pearson and W. H. Raymond},
  year = {1992},
  doi = {10.3133/mr96},
  url = {https://pubs.usgs.gov/publication/mr96},
  note = {Source identifier: mr96}
}