@misc{indiciaea686526f0eb9,
  title = {Coal resource occurrence and coal development potential maps of the Sarpy School quadrangle, Big Horn, Rosebud, and Treasure Counties, Montana},
  author = {Colorado School of Mines Research Institute},
  year = {1979},
  doi = {10.3133/ofr7918},
  url = {https://pubs.usgs.gov/publication/ofr7918},
  note = {Source identifier: ofr7918}
}