@misc{indiciae92b52e1fa045,
  title = {Geographic map of the eastern Rub Al Khali quadrangle, Kingdom of Saudi Arabia},
  author = {E.L. Elberg and Ruel D. Gierhart and Leon F. Ramirez},
  year = {1962},
  doi = {10.3133/i215b},
  url = {https://pubs.usgs.gov/publication/i215B},
  note = {Source identifier: i215B}
}