@misc{indiciae051bc6923c8f,
  title = {A geologic and mineral reconnaissance by helicopter in a part of the Tihamat Ash Sham quadrangle, Saudi Arabia},
  author = {Virgil A. Trent},
  year = {1968},
  doi = {10.3133/ofr68272},
  url = {https://pubs.usgs.gov/publication/ofr68272},
  note = {Source identifier: ofr68272}
}