@misc{indiciae2103e301efc2,
  title = {Geologic map of the Bonner quadrangle, Montana},
  author = {W. H. Nelson and J.P. Dobell},
  year = {1959},
  doi = {10.3133/i296},
  url = {https://pubs.usgs.gov/publication/i296},
  note = {Source identifier: i296}
}