@misc{indiciae80c4c6f0e264,
  title = {Coal resource occurrence and coal development potential maps of the Sayle Quadrangle, Powder River County, Montana},
  author = {Colorado School of Mines Research Institute},
  year = {1979},
  doi = {10.3133/ofr79789},
  url = {https://pubs.usgs.gov/publication/ofr79789},
  note = {Source identifier: ofr79789}
}