@misc{indiciae3fb155a5cdf5,
  title = {Base of fresh ground water (approximately 3,000 micromhos) in the San Joaquin Valley, California},
  author = {R. W. Page},
  year = {1973},
  doi = {10.3133/ha489},
  url = {https://pubs.usgs.gov/publication/ha489},
  note = {Source identifier: ha489}
}