@misc{indiciae90d14a7f3699,
  title = {Reconnaissance geology of the Wadi Shuqub Quadrangle, sheet 20/41 A, Kingdom of Saudi Arabia},
  author = {Robert C. Greene and Louis Gonzalez},
  year = {1979},
  doi = {10.3133/ofr791353},
  url = {https://pubs.usgs.gov/publication/ofr791353},
  note = {Source identifier: ofr791353}
}