@misc{indiciae117c553333a2,
  title = {Geology of the northern Tuwayq quadrangle, Kingdom of Saudi Arabia},
  author = {Richard A. Bramkamp and Leon F. Ramirez},
  year = {1958},
  doi = {10.3133/i207a},
  url = {https://pubs.usgs.gov/publication/i207A},
  note = {Source identifier: i207A}
}