@misc{indiciaedc0c0339f2d7,
  title = {Geologic map of the Bannack-Grayling area, Beaverhead County, Montana},
  author = {W.R. Lowell},
  year = {1965},
  doi = {10.3133/i433},
  url = {https://pubs.usgs.gov/publication/i433},
  note = {Source identifier: i433}
}