@misc{indiciae68b0228b0d88,
  title = {Structural geology of the Sun River Canyon and adjacent areas, northwestern Montana},
  author = {Melville Rhodes Mudge},
  year = {1972},
  doi = {10.3133/pp663b},
  url = {https://pubs.usgs.gov/publication/pp663B},
  note = {Source identifier: pp663B}
}