@misc{indiciae73c124729eaa,
  title = {Aeromagnetic map of the Sapphire/Anaconda Mountains area, Montana},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1981},
  doi = {10.3133/ofr811160},
  url = {https://pubs.usgs.gov/publication/ofr811160},
  note = {Source identifier: ofr811160}
}