@misc{indiciae5e56fc653cd8,
  title = {Borehole geophysics applied to ground-water investigations},
  author = {W.S. Keys},
  year = {1988},
  doi = {10.3133/ofr87539},
  url = {https://pubs.usgs.gov/publication/ofr87539},
  note = {Source identifier: ofr87539}
}