@misc{indiciae30420f02fb6c,
  title = {The ore deposits of Tonopah, Nevada (preliminary report)},
  author = {Josiah Edward Spurr},
  year = {1903},
  doi = {10.3133/b219},
  url = {https://pubs.usgs.gov/publication/b219},
  note = {Source identifier: b219}
}