@misc{indiciae48c9fdfaa042,
  title = {Ground-water levels in the United States, 1971-74, northwestern states},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1977},
  doi = {10.3133/wsp2161},
  url = {https://pubs.usgs.gov/publication/wsp2161},
  note = {Source identifier: wsp2161}
}