@misc{indiciaefc4bcc27523c,
  title = {Geologic map of the southern part of the Upper Red Rock Lake Quadrangle, southwestern Montana and adjacent Idaho},
  author = {I. J. Witkind},
  year = {1976},
  doi = {10.3133/i943},
  url = {https://pubs.usgs.gov/publication/i943},
  note = {Source identifier: i943}
}