@misc{indiciae95f8779c22dc,
  title = {Geologic map of Oregon west of the 121st meridian},
  author = {F. G. prepared under the direction of Wells and D. L. Peck},
  year = {1961},
  doi = {10.3133/i325},
  url = {https://pubs.usgs.gov/publication/i325},
  note = {Source identifier: i325}
}