@misc{indiciae23290fa6c192,
  title = {Strippable coal in Custer and Powder River Counties, Montana},
  author = {Andrew Brown and W.C. Culbertson and R.J. Dunham and R.C. Kepferle and P.R. May},
  year = {1954},
  doi = {10.3133/b995e},
  url = {https://pubs.usgs.gov/publication/b995E},
  note = {Source identifier: b995E}
}