@misc{indiciae3ef715db03bb,
  title = {Origin, extent, and thickness of quaternary geologic units in the Willamette Valley, Oregon},
  author = {Jim E. O'Connor and Andrei M. Sarna-Wojcicki and Karl C. Wozniak and Danial J. Polette and Robert J. Fleck},
  year = {2001},
  doi = {10.3133/pp1620},
  url = {https://pubs.usgs.gov/publication/pp1620},
  note = {Source identifier: pp1620}
}