@misc{indiciae1c1f1430b387,
  title = {Geologic and tectonic maps of the Bearpaw Mountains area, north-central Montana},
  author = {B. Carter Hearn,},
  year = {1974},
  doi = {10.3133/ofr7423},
  url = {https://pubs.usgs.gov/publication/ofr7423},
  note = {Source identifier: ofr7423}
}