@misc{indiciaec7e0c7f19562,
  title = {Mineral deposits of the Dhahar-Al Hajrah region, southwestern Saudi Arabia, with a note on the ancient mine at Shasrah},
  author = {C. W. Smith},
  year = {1981},
  doi = {10.3133/ofr81561},
  url = {https://pubs.usgs.gov/publication/ofr81561},
  note = {Source identifier: ofr81561}
}