@misc{indiciae2ca9f11e34fc,
  title = {Aeromagnetic map of the Thompson Falls quadrangle, Lincoln and Sanders Counties, Montana},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1969},
  doi = {10.3133/gp686},
  url = {https://pubs.usgs.gov/publication/gp686},
  note = {Source identifier: gp686}
}