@misc{indiciae3dee389b6fd9,
  title = {National water information system user's manual; Volume 2, Chapter 2, Water-quality system},
  author = {D.V. Maddy and L.E. Lopp and D.L. Jackson and R.H. Coupe and T. L. Schertz},
  year = {1989},
  doi = {10.3133/ofr89617},
  url = {https://pubs.usgs.gov/publication/ofr89617},
  note = {Source identifier: ofr89617}
}