@misc{indiciae804b32a65250,
  title = {Geologic map of the Spirit Lake East quadrangle, Skamania County, Washington},
  author = {Russell C. Evarts and Roger P. Ashley},
  year = {1993},
  doi = {10.3133/gq1679},
  url = {https://pubs.usgs.gov/publication/gq1679},
  note = {Source identifier: gq1679}
}