@misc{indiciaeb4600485cea9,
  title = {Summary of activities, U.S. Geological Survey Saudi Arabian project, 1950 to 1974},
  author = {Thor H. Kiilsgaard},
  year = {1974},
  doi = {10.3133/ofr74129},
  url = {https://pubs.usgs.gov/publication/ofr74129},
  note = {Source identifier: ofr74129}
}