@misc{indiciae9c56a6846c02,
  title = {Coal resource occurrence and coal development potential maps of the Willow Crossing Quadrangle, Powder River and Rosebud counties, Montana},
  author = {Colorado School of Mines Research Institute},
  year = {1979},
  doi = {10.3133/ofr79101},
  url = {https://pubs.usgs.gov/publication/ofr79101},
  note = {Source identifier: ofr79101}
}