@misc{indiciae6969e1d1d56c,
  title = {Geology of the Silsilah ring complex and associated tin mineralization, Kingdom of Saudi Arabia},
  author = {E. A. Du Bray},
  year = {1988},
  doi = {10.3133/pp1459},
  url = {https://pubs.usgs.gov/publication/pp1459},
  note = {Source identifier: pp1459}
}