@misc{indiciae7f874ffe01e3,
  title = {Geologic map of the Cowlitz Falls quadrangle, Lewis and Skamania Counties, Washington},
  author = {Russell C. Evarts and Roger P. Ashley},
  year = {1993},
  doi = {10.3133/gq1682},
  url = {https://pubs.usgs.gov/publication/gq1682},
  note = {Source identifier: gq1682}
}