@misc{indiciae0ee7ccdfbba1,
  title = {Mineral resources of the Spanish Peaks primitive area, Montana},
  author = {George Earle Becraft and J.A. Calkins and E. C. Pattee and R.D. Weldin and J.M. Roche},
  year = {1966},
  doi = {10.3133/b1230b},
  url = {https://pubs.usgs.gov/publication/b1230B},
  note = {Source identifier: b1230B}
}