@misc{indiciae36ab28a2d74a,
  title = {Geology of the northwestern Rub' Al Khali quadrangle, Kingdom of Saudi Arabia},
  author = {Richard A. Bramkamp and Leon F. Ramirez},
  year = {1959},
  doi = {10.3133/i213a},
  url = {https://pubs.usgs.gov/publication/i213A},
  note = {Source identifier: i213A}
}