@misc{indiciaed4cfb22ac98f,
  title = {Subsurface cross section of Paleozoic rocks from Barber County, Kansas, to Caddo County, Oklahoma},
  author = {W.L. Adkison},
  year = {1960},
  doi = {10.3133/oc61},
  url = {https://pubs.usgs.gov/publication/oc61},
  note = {Source identifier: oc61}
}