@misc{indiciae8b45c58a7157,
  title = {Geology and mineral resources of north-central Chouteau, western Hill, and eastern Liberty counties, Montana},
  author = {William Gamewell Pierce and Charles Butler Hunt},
  year = {1937},
  doi = {10.3133/b847f},
  url = {https://pubs.usgs.gov/publication/b847F},
  note = {Source identifier: b847F}
}