@misc{indiciae999758ae131b,
  title = {A preliminary study of thermometry and metal sources of the Spar Lake strata-bound copper-silver deposit, Belt Supergroup, Montana},
  author = {T. S. Hayes},
  year = {1990},
  doi = {10.3133/ofr90484},
  url = {https://pubs.usgs.gov/publication/ofr90484},
  note = {Source identifier: ofr90484}
}