@misc{indiciae82271020cf27,
  title = {East Cortez coal area, Montezuma County, Colorado},
  author = {Henry L. Cullins and William E. Bowers},
  year = {1965},
  doi = {10.3133/ofr6537},
  url = {https://pubs.usgs.gov/publication/ofr6537},
  note = {Source identifier: ofr6537}
}