@misc{indiciae37558de637aa,
  title = {Delineating the Pierre Shale from geophysical surveys east and southeast of Ellsworth Air Force Base, South Dakota, 2021},
  author = {Colton J. Medler},
  year = {2022},
  doi = {10.3133/sim3497},
  url = {https://pubs.usgs.gov/publication/sim3497},
  note = {Source identifier: sim3497}
}