@misc{indiciae881e50b2b8f9,
  title = {Oelrichs folio, South Dakota-Nebraska},
  author = {Nelson Horatio Darton},
  year = {1902},
  doi = {10.3133/gf85},
  url = {https://pubs.usgs.gov/publication/gf85},
  note = {Source identifier: gf85}
}