@misc{indiciaef2cc80ae4c34,
  title = {User's manual for the National Water Information System of the U.S. Geological Survey; Chapter 2, Water-quality system},
  author = {Kerry T. Garcia and David V. Maddy and Lari E. Lopp and D. Lynn Jackson and Richard H. Coupe and Terry L. Schertz},
  year = {1997},
  doi = {10.3133/ofr97634},
  url = {https://pubs.usgs.gov/publication/ofr97634},
  note = {Source identifier: ofr97634}
}