@misc{indiciae7cec80598705,
  title = {Geophysical logging of boreholes for hydrologic studies},
  author = {A.I. Johnson},
  year = {1963},
  doi = {10.3133/ofr6361},
  url = {https://pubs.usgs.gov/publication/ofr6361},
  note = {Source identifier: ofr6361}
}