@misc{indiciae08c14d914d54,
  title = {Geologic Map of the Ridgefield Quadrangle, Clark and Cowlitz Counties, Washington},
  author = {Russell C. Evarts and Philip digital database by Dinterman and Jessica Block},
  year = {2004},
  doi = {10.3133/sim2844},
  url = {https://pubs.usgs.gov/publication/sim2844},
  note = {Source identifier: sim2844}
}