@misc{indiciaed77a7ba27478,
  title = {Geologic map of the Spring Creek quadrangle, Valley County, Montana},
  author = {R. B. Colton},
  year = {1963},
  doi = {10.3133/i369},
  url = {https://pubs.usgs.gov/publication/i369},
  note = {Source identifier: i369}
}