@misc{indiciae5a9586814c37,
  title = {Geophysical ore guides along the Colorado mineral belt},
  author = {James E. Case},
  year = {1967},
  doi = {10.3133/ofr6739},
  url = {https://pubs.usgs.gov/publication/ofr6739},
  note = {Source identifier: ofr6739}
}