@misc{indiciae1921b94b8f08,
  title = {Preliminary geologic map of the White Sulphur Springs 30' x 60' Quadrangle, Montana},
  author = {Mitchell W. Reynolds and Theodore R. Brandt},
  year = {2006},
  doi = {10.3133/ofr20061329},
  url = {https://pubs.usgs.gov/publication/ofr20061329},
  note = {Source identifier: ofr20061329}
}