@misc{indiciaeda79548214fb,
  title = {Mineral resources of the Humbug Spires Instant Study Area, (primitive area and adjacent roadless areas), Silver Bow County, Montana},
  author = {Harry Wynn Smedes and William F. Hanna and Michael Hamilton},
  year = {1980},
  doi = {10.3133/ofr80836},
  url = {https://pubs.usgs.gov/publication/ofr80836},
  note = {Source identifier: ofr80836}
}