@misc{indiciae21ab4a1e39c3,
  title = {Newcastle folio, Wyoming-South Dakota},
  author = {N.H. Darton},
  year = {1904},
  doi = {10.3133/gf107},
  url = {https://pubs.usgs.gov/publication/gf107},
  note = {Source identifier: gf107}
}