@misc{indiciae9e9ccdc6c801,
  title = {Ground-water levels in the United States, 1966-70, northwestern states},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/wsp1980},
  url = {https://pubs.usgs.gov/publication/wsp1980},
  note = {Source identifier: wsp1980}
}