@misc{indiciaeb19c8e65c980,
  title = {Geologic map of the Oswego quadrangle, Valley, Roosevelt, and McCone Counties, Montana},
  author = {R. B. Colton},
  year = {1963},
  doi = {10.3133/i366},
  url = {https://pubs.usgs.gov/publication/i366},
  note = {Source identifier: i366}
}