@misc{indiciae3c75ac69adea,
  title = {Aeromagnetic map of the Cripple Creek mining district, Teller County, Colorado},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1969},
  doi = {10.3133/ofr69288},
  url = {https://pubs.usgs.gov/publication/ofr69288},
  note = {Source identifier: ofr69288}
}