@misc{indiciae1696a044ed03,
  title = {Monitoring of changes in quality of ground water},
  author = {H. E. LeGrand},
  year = {2006},
  doi = {10.1111/j.1745-6584.1968.tb01645.x},
  url = {https://pubs.usgs.gov/publication/70221386},
  note = {Source identifier: 70221386}
}