@misc{indiciae7f748dbde76c,
  title = {Structure and oil and gas resources of the Osage Reservation, Oklahoma. T. 27 N., R. 7 E.},
  author = {K. C. Heald},
  year = {1922},
  doi = {10.3133/b686k},
  url = {https://pubs.usgs.gov/publication/b686K},
  note = {Source identifier: b686K}
}