@misc{indiciae34dde8bd2fa6,
  title = {Preliminary geologic map of the Goldfield mining district, Nevada},
  author = {R. P. Ashley},
  year = {1975},
  doi = {10.3133/mf681},
  url = {https://pubs.usgs.gov/publication/mf681},
  note = {Source identifier: mf681}
}