@misc{indiciaea278a8c7420f,
  title = {Geologic map of the greater Portland metropolitan area and surrounding region, Oregon and Washington},
  author = {Ray E. Wells and Ralph A. Haugerud and Alan R. Niem and Wendy A. Niem and Lina Ma and Russell C. Evarts and Jim E. O'Connor and Ian P. Madin and David R. Sherrod and Marvin H. Beeson and Terry L. Tolan and Karen L. Wheeler and William B. Hanson and Michael G. Sawlan},
  year = {2020},
  doi = {10.3133/sim3443},
  url = {https://pubs.usgs.gov/publication/sim3443},
  note = {Source identifier: sim3443}
}