@misc{indiciae842248bad99d,
  title = {Reconnaissance geologic map of the Harrat Tuffil Quadrangle, sheet 20/39 B, Kingdom of Saudi Arabia},
  author = {John S. Pallister},
  year = {1983},
  doi = {10.3133/ofr83332},
  url = {https://pubs.usgs.gov/publication/ofr83332},
  note = {Source identifier: ofr83332}
}