@misc{indiciae04b875f00418,
  title = {Hydrogeologic framework of the Willamette Lowland aquifer system, Oregon and Washington},
  author = {D. G. Woodward and Marshall W. Gannett and J. J. Vaccaro},
  year = {1998},
  doi = {10.3133/pp1424b},
  url = {https://pubs.usgs.gov/publication/pp1424B},
  note = {Source identifier: pp1424B}
}