@misc{indiciae55f39de02a59,
  title = {Pimpled plains of Eastern Oklahoma},
  author = {M. M. Knechtel},
  year = {1952},
  doi = {10.1130/0016-7606(1952)63[689:ppoeo]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70221606},
  note = {Source identifier: 70221606}
}