@misc{indiciae79d5c3b2ce7d,
  title = {Note on occurrence of ground water and use of tracers on ground-water investigations},
  author = {E.S. Simpson},
  year = {1958},
  doi = {10.3133/ofr5893},
  url = {https://pubs.usgs.gov/publication/ofr5893},
  note = {Source identifier: ofr5893}
}