@misc{indiciae080b5535e6dd,
  title = {Geologic map of parts of the Yaak River area, Lincoln County, northwest Montana},
  author = {Earle Rupert Cressman and Jack Edward Harrison},
  year = {1986},
  doi = {10.3133/mf1881},
  url = {https://pubs.usgs.gov/publication/mf1881},
  note = {Source identifier: mf1881}
}