@misc{indiciaec6ce216b98b9,
  title = {Bouguer gravity map of the Cripple Creek mining district, Teller County, Colorado},
  author = {M. Dean Kleinkopf and Donald L. Peterson},
  year = {1969},
  doi = {10.3133/ofr69138},
  url = {https://pubs.usgs.gov/publication/ofr69138},
  note = {Source identifier: ofr69138}
}