@misc{indiciaed74ad55ea71c,
  title = {Evaluation of the Um Gerad barite deposits near Rabigh, Kingdom of Saudi Arabia},
  author = {Donald Albert Brobst},
  year = {1972},
  doi = {10.3133/ofr7248},
  url = {https://pubs.usgs.gov/publication/ofr7248},
  note = {Source identifier: ofr7248}
}