@misc{indiciaedec9d7aefaa5,
  title = {Reconnaissance geology of the Jibal Matalli Quadrangle, sheet 27/40 D, Kingdom of Saudi Arabia},
  author = {E. B. Ekren},
  year = {1984},
  doi = {10.3133/ofr84378},
  url = {https://pubs.usgs.gov/publication/ofr84378},
  note = {Source identifier: ofr84378}
}