@misc{indiciae8adedf6c1ac4,
  title = {Application of borehole geophysics to water-resources investigations},
  author = {W.S. Keys and L.M. MacCary},
  year = {1971},
  doi = {10.3133/twri02e1},
  url = {https://pubs.usgs.gov/publication/twri02E1},
  note = {Source identifier: twri02E1}
}