@misc{indiciae8729bd616074,
  title = {Geology of the Wadi Al Batin quadrangle, Kingdom of Saudi Arabia},
  author = {Richard A. Bramkamp and Leon F. Ramirez},
  year = {1959},
  doi = {10.3133/i203a},
  url = {https://pubs.usgs.gov/publication/i203A},
  note = {Source identifier: i203A}
}