@misc{indiciaeaf52e61b0fc3,
  title = {Distribution of gold and other metals in silicified rocks of the Goldfield mining district, Nevada},
  author = {Roger P. Ashley and William J. Keith},
  year = {1976},
  doi = {10.3133/pp843b},
  url = {https://pubs.usgs.gov/publication/pp843B},
  note = {Source identifier: pp843B}
}