@misc{indiciae4c0d27bc3a4e,
  title = {Surficial geologic map of the Castle Reef quadrangle, Teton and Lewis and Clark Counties, Montana},
  author = {Melville Rhodes Mudge},
  year = {1972},
  doi = {10.3133/gq991},
  url = {https://pubs.usgs.gov/publication/gq991},
  note = {Source identifier: gq991}
}