@misc{indiciae778ad21c5166,
  title = {Geology and mineral evaluation of the Wadi Bidah district, southern Hijaz quadrangle, Kingdom of Saudi Arabia},
  author = {Robert L. Earhart and Mustafa M. Mawad},
  year = {1970},
  doi = {10.3133/ofr70116},
  url = {https://pubs.usgs.gov/publication/ofr70116},
  note = {Source identifier: ofr70116}
}