@misc{indiciaeca214ca97f2d,
  title = {Reconnaissance geochemical exploration for gold in the Ad Darb area, Kingdom of Saudi Arabia},
  author = {R.M. Samater and R.P. Christian and P.R. Johnson and A. A. Bookstrom},
  year = {1990},
  doi = {10.3133/ofr90285},
  url = {https://pubs.usgs.gov/publication/ofr90285},
  note = {Source identifier: ofr90285}
}