@misc{indiciaef0cf0b404efd,
  title = {Geologic Map of the Saint Helens Quadrangle, Columbia County, Oregon, and Clark and Cowlitz Counties, Washington},
  author = {Russell C. Evarts},
  year = {2004},
  doi = {10.3133/sim2834},
  url = {https://pubs.usgs.gov/publication/sim2834},
  note = {Source identifier: sim2834}
}