@misc{indiciae75942884b78d,
  title = {Coal resource occurrence and coal development potential maps of the Wolf School Quadrangle, Big Horn and Treasure counties, Montana},
  author = {Colorado School of Mines Research Institute},
  year = {1979},
  doi = {10.3133/ofr7920},
  url = {https://pubs.usgs.gov/publication/ofr7920},
  note = {Source identifier: ofr7920}
}