@misc{indiciae0338785d4b6b,
  title = {Aeromagnetic map of the Powderhorn area, Colorado},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1979},
  doi = {10.3133/ofr791227},
  url = {https://pubs.usgs.gov/publication/ofr791227},
  note = {Source identifier: ofr791227}
}