@misc{indiciaed702836718a3,
  title = {Federal coal resource occurrence map of the southeast quarter of the Heavener 15-minute quadrangle, Le Flore County, Oklahoma},
  author = {B. T. Brady and J. L. Querry},
  year = {1985},
  doi = {10.3133/ofr79499},
  url = {https://pubs.usgs.gov/publication/ofr79499},
  note = {Source identifier: ofr79499}
}