@misc{indiciaeff3891ba1f5e,
  title = {A primer on water quality},
  author = {H. A. Swenson and H. L. Baldwin},
  year = {1965},
  doi = {10.3133/7000057},
  url = {https://pubs.usgs.gov/publication/7000057},
  note = {Source identifier: 7000057}
}