@misc{indiciaeb75752e0c7b8,
  title = {Aeromagnetic map of the Great Falls-Brown Lake area, northwestern Montana},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1967},
  doi = {10.3133/ofr67242},
  url = {https://pubs.usgs.gov/publication/ofr67242},
  note = {Source identifier: ofr67242}
}