@misc{indiciae92b4c9e0d924,
  title = {Geology of the Otter Creek quadrangle, Montana},
  author = {Roger B. Colton},
  year = {1962},
  doi = {10.3133/b1111g},
  url = {https://pubs.usgs.gov/publication/b1111G},
  note = {Source identifier: b1111G}
}