@misc{indiciae92edae5600ac,
  title = {Geographic map of the Tihamat Ash Sham quadrangle, Kingdom of Saudi Arabia},
  author = {Glen F. Brown and Roy O. Jackson},
  year = {1968},
  doi = {10.3133/i216b},
  url = {https://pubs.usgs.gov/publication/i216B},
  note = {Source identifier: i216B}
}