@misc{indiciae48190a2941bb,
  title = {Structure and oil and gas resources of the Osage Reservation, Oklahoma. T. 25 N., Rs. 11 and 12 E.},
  author = {O. B. Hopkins},
  year = {1922},
  doi = {10.3133/b686h},
  url = {https://pubs.usgs.gov/publication/b686H},
  note = {Source identifier: b686H}
}