@misc{indiciaed52c8529a88c,
  title = {Summary of activities, U.S. Geological Survey-Saudi Arabian project, 1950 to 1975},
  author = {Thor H. Kiilsgaard},
  year = {1975},
  doi = {10.3133/ofr75492},
  url = {https://pubs.usgs.gov/publication/ofr75492},
  note = {Source identifier: ofr75492}
}