@misc{indiciae16cf73cae9ab,
  title = {Ancient mines of the Farah Garan area, southwestern Saudi Arabia},
  author = {C. W. Smith and H. Richard Blank},
  year = {1979},
  doi = {10.3133/ofr791659},
  url = {https://pubs.usgs.gov/publication/ofr791659},
  note = {Source identifier: ofr791659}
}