@misc{indiciae78e9aec198ac,
  title = {Results of grid sampling and large-scale geologic mapping for the Silsilah tin deposit, Saudi Arabia},
  author = {E. A. Du Bray and C. W. Smith and R.M. Samater},
  year = {1985},
  doi = {10.3133/ofr8510},
  url = {https://pubs.usgs.gov/publication/ofr8510},
  note = {Source identifier: ofr8510}
}