@misc{indiciae9fd6d704ed4e,
  title = {Methods of measuring water levels in deep wells},
  author = {M. S. Garber and F. C. Koopman},
  year = {1968},
  doi = {10.3133/twri08a1},
  url = {https://pubs.usgs.gov/publication/twri08A1},
  note = {Source identifier: twri08A1}
}