@misc{indiciae56dfadcbca04,
  title = {Geology of the Silsilah ring complex, Kingdom of Saudi Arabia},
  author = {E. A. Du Bray},
  year = {1985},
  doi = {10.3133/ofr85253},
  url = {https://pubs.usgs.gov/publication/ofr85253},
  note = {Source identifier: ofr85253}
}