@misc{indiciae339ff6607534,
  title = {A description of hydrogeologic units in the Portland Basin, Oregon and Washington},
  author = {R.D. Swanson and W. D. McFarland and J. B. Gonthier and J.M. Wilkinson},
  year = {1993},
  doi = {10.3133/wri904196},
  url = {https://pubs.usgs.gov/publication/wri904196},
  note = {Source identifier: wri904196}
}