@misc{indiciae9ed0aeaa578b,
  title = {Geologic map of the Vanson Peak quadrangle, Lewis, Cowlitz, and Skamania counties, Washington},
  author = {Russell C. Evarts and Roger P. Ashley},
  year = {1993},
  doi = {10.3133/gq1680},
  url = {https://pubs.usgs.gov/publication/gq1680},
  note = {Source identifier: gq1680}
}