@misc{indiciaea62ffcd2619d,
  title = {Geology of phosphate deposits in the Sirhan-Turayf basin, Kingdom of Saudi Arabia},
  author = {Charles R. Meissner and Abdullah Ankary},
  year = {1970},
  doi = {10.3133/20095},
  url = {https://pubs.usgs.gov/publication/20095},
  note = {Source identifier: 20095}
}