@misc{indiciaedc2886dcac3a,
  title = {Precambrian geochronology of part of northwestern Saudi Arabia, Kingdom of Saudi Arabia},
  author = {C. E. Hedge},
  year = {1984},
  doi = {10.3133/ofr84381},
  url = {https://pubs.usgs.gov/publication/ofr84381},
  note = {Source identifier: ofr84381}
}