@misc{indiciaec97309d69cfc,
  title = {Coal resource occurrence and coal development potential maps of the Brandenberg NW Quadrangle, Custer and Rosebud counties, Montana},
  author = {Colorado School of Mines Research Institute},
  year = {1979},
  doi = {10.3133/ofr78642},
  url = {https://pubs.usgs.gov/publication/ofr78642},
  note = {Source identifier: ofr78642}
}