@misc{indiciaef6d00ae27d31,
  title = {Coal fields of the Wind River region, Fremont and Natrona counties, Wyoming},
  author = {E. G. Woodruff and D. E. Winchester},
  year = {1912},
  doi = {10.3133/b471g},
  url = {https://pubs.usgs.gov/publication/b471G},
  note = {Source identifier: b471G}
}