@misc{indiciae920231fd58a2,
  title = {Geologic map of the Beacon Rock quadrangle, Skamania County, Washington},
  author = {Russell C. Evarts and Robert J. Fleck},
  year = {2017},
  doi = {10.3133/sim3367},
  url = {https://pubs.usgs.gov/publication/sim3367},
  note = {Source identifier: sim3367}
}