@misc{indiciaec232930d0b76,
  title = {Coal resource occurrence and coal development potential maps of the Green Creek quadrangle, Rosebud County, Montana},
  author = {Colorado School of Mines},
  year = {1979},
  doi = {10.3133/ofr7989},
  url = {https://pubs.usgs.gov/publication/ofr7989},
  note = {Source identifier: ofr7989}
}