@misc{indiciaee6ad9f7f2791,
  title = {Geologic and structure map of the Williams Fork Mountains coal field, Moffat County, Colorado},
  author = {George Henry Horn and Everett E. Richardson},
  year = {1959},
  doi = {10.3133/ofr5965},
  url = {https://pubs.usgs.gov/publication/ofr5965},
  note = {Source identifier: ofr5965}
}