@misc{indiciae716233033f3a,
  title = {Geologic map of the Washougal quadrangle, Clark County, Washington, and Multnomah County, Oregon},
  author = {Russell C. Evarts and Jim E. O'Connor and Terry L. Tolan},
  year = {2013},
  doi = {10.3133/sim3257},
  url = {https://pubs.usgs.gov/publication/sim3257},
  note = {Source identifier: sim3257}
}