@misc{indiciae91b97fef9b68,
  title = {Aeromagnetic map of part of the Challis 1° by 2° quadrangle, Idaho},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/gp835},
  url = {https://pubs.usgs.gov/publication/gp835},
  note = {Source identifier: gp835}
}