@misc{indiciaebf1287081528,
  title = {Coal resource occurrence and coal development potential maps of the Lacey Gulch Quadrangle, Rosebud County, Montana},
  author = {W. J. Mapel and B. K. Martin and B. A. Butler},
  year = {1978},
  doi = {10.3133/ofr7837},
  url = {https://pubs.usgs.gov/publication/ofr7837},
  note = {Source identifier: ofr7837}
}