@misc{indiciae04aef0599d46,
  title = {Subsurface geology and oil and gas resources of Osage County, Oklahoma. Part 7, Townships 20 and 21 north, ranges 11 and 12 east},
  author = {W.R. Dillar and N. W. Bass and C. T. Kirk},
  year = {1941},
  doi = {10.3133/b900g},
  url = {https://pubs.usgs.gov/publication/b900G},
  note = {Source identifier: b900G}
}