@misc{indiciae977e7ea2541a,
  title = {Structure and oil and gas resources of the Osage Reservation, Oklahoma. Tps. 20 and 21 N., R. 12 E.},
  author = {C. S. Ross},
  year = {1922},
  doi = {10.3133/b686n},
  url = {https://pubs.usgs.gov/publication/b686N},
  note = {Source identifier: b686N}
}