@misc{indiciae369430412f40,
  title = {Federal coal resource occurrence map of the Wilburton quadrangle, Latimer County, Oklahoma},
  author = {Bruce T. Brady},
  year = {1983},
  doi = {10.3133/ofr79303},
  url = {https://pubs.usgs.gov/publication/ofr79303},
  note = {Source identifier: ofr79303}
}