@misc{indiciae901dd73daa09,
  title = {Geologic map of the Spirit Lake West quadrangle, Skamania and Cowlitz Counties, Washington},
  author = {Russell C. Evarts and Roger P. Ashley},
  year = {1993},
  doi = {10.3133/gq1681},
  url = {https://pubs.usgs.gov/publication/gq1681},
  note = {Source identifier: gq1681}
}