@misc{indiciaef7364467c0dd,
  title = {Index map of 1:50,000-scale mosaics SAG and GSMO photography 1950-1953, Kingdom of Saudi Arabia},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1980},
  doi = {10.3133/ofr801306},
  url = {https://pubs.usgs.gov/publication/ofr801306},
  note = {Source identifier: ofr801306}
}