@misc{indiciae5d9c214c7588,
  title = {Ground water in North America},
  author = {Harold E. Thomas and Luna Bergere Leopold},
  year = {1964},
  doi = {10.1126/science.143.3610.1001},
  url = {https://pubs.usgs.gov/publication/70010816},
  note = {Source identifier: 70010816}
}