@misc{indiciaea576ec8ce7c4,
  title = {Methods of locating salt-water leaks in water wells},
  author = {Penn Poore Livingston and Walter Lynch},
  year = {1937},
  doi = {10.3133/wsp796a},
  url = {https://pubs.usgs.gov/publication/wsp796A},
  note = {Source identifier: wsp796A}
}