@misc{indiciaecc83266c85ff,
  title = {Coal resource occurrence and coal development potential maps of the Jack Creek Quadrangle, Custer County, Montana},
  author = {Colorado School of Mines Research Institute},
  year = {1978},
  doi = {10.3133/ofr78639},
  url = {https://pubs.usgs.gov/publication/ofr78639},
  note = {Source identifier: ofr78639}
}