@misc{indiciae3bd4d5194522,
  title = {Report of the Geological Exploration of the Fortieth Parallel, Volume III: Mining industry},
  author = {James D. Hague and Clarence King},
  year = {1870},
  doi = {10.3133/70039896},
  url = {https://pubs.usgs.gov/publication/70039896},
  note = {Source identifier: 70039896}
}