@misc{indiciae707a51488474,
  title = {Map showing the Mammoth coal bed, Paleocene Fort Union Formation in the Bull Mountains, Musselshell and Yellowstone Counties, Montana},
  author = {Carol Waite Connor and Jean K. Griffith},
  year = {1980},
  doi = {10.3133/ofr80711},
  url = {https://pubs.usgs.gov/publication/ofr80711},
  note = {Source identifier: ofr80711}
}