@misc{indiciae71b972cc8550,
  title = {Report on field trip to the Jabal As Sawrah and Wadi Al'Ays areas, northwestern Hijaz quadrangle, Saudi Arabia},
  author = {Robert Francis Johnson and Virgil A. Trent},
  year = {1972},
  doi = {10.3133/ofr72197},
  url = {https://pubs.usgs.gov/publication/ofr72197},
  note = {Source identifier: ofr72197}
}