@misc{indiciae86faa362911b,
  title = {Reconnaissance geologic map of the Jabal Zain Quadrangle, sheet 20/44A, Kingdom of Saudi Arabia},
  author = {Maurice R. Brock},
  year = {1983},
  doi = {10.3133/ofr83639},
  url = {https://pubs.usgs.gov/publication/ofr83639},
  note = {Source identifier: ofr83639}
}