@misc{indiciaef567440f9631,
  title = {Spotted Horse coal field, Sheridan and Campbell Counties, Wyoming},
  author = {Wilds W. Olive},
  year = {1953},
  doi = {10.3133/ofr53200},
  url = {https://pubs.usgs.gov/publication/ofr53200},
  note = {Source identifier: ofr53200}
}