@misc{indiciae42d521f34ac2,
  title = {Ground water in the northern part of Clackamas County, Oregon},
  author = {A.R. Leonard and C. A. Collins},
  year = {1983},
  doi = {10.3133/ofr801049},
  url = {https://pubs.usgs.gov/publication/ofr801049},
  note = {Source identifier: ofr801049}
}