@misc{indiciae98142447ac51,
  title = {Geographic map of the southern Najd quadrangle, Kingdom of Saudi Arabia},
  author = {Roy O. Jackson and R.G. Bogue and Glen F. Brown and Ruel D. Gierhart},
  year = {1962},
  doi = {10.3133/i211b},
  url = {https://pubs.usgs.gov/publication/i211B},
  note = {Source identifier: i211B}
}