@misc{indiciae4abc4c6e3b45,
  title = {Mineral investigations in the Al Aqiq area, Saudi Arabia},
  author = {Virgil A. Trent},
  year = {1968},
  doi = {10.3133/ofr68273},
  url = {https://pubs.usgs.gov/publication/ofr68273},
  note = {Source identifier: ofr68273}
}