@misc{indiciaef3513d2073c2,
  title = {The Rosebud coal field, Rosebud and Custer Counties, Montana},
  author = {W. G. Pierce},
  year = {1936},
  doi = {10.3133/b847b},
  url = {https://pubs.usgs.gov/publication/b847B},
  note = {Source identifier: b847B}
}