@misc{indiciaee87221fee5bd,
  title = {Geographic map of the northern Tuwayq quadrangle, Kingdom of Saudi Arabia},
  author = {Richard A. Bramkamp and Leon F. Ramirez},
  year = {1957},
  doi = {10.3133/i207b},
  url = {https://pubs.usgs.gov/publication/i207B},
  note = {Source identifier: i207B}
}