@misc{indiciae78dbe7b5acdb,
  title = {Geographic map of the Southern Hijaz quadrangle, Kingdom of Saudi Arabia},
  author = {Glen F. Brown and Roy O. Jackson},
  year = {1969},
  doi = {10.3133/i210b},
  url = {https://pubs.usgs.gov/publication/i210B},
  note = {Source identifier: i210B}
}