@misc{indiciaedfa2ec17a26e,
  title = {Quality-control design for surface-water sampling in the National Water-Quality Assessment Program},
  author = {David K. Mueller and Jeffrey D. Martin and Thomas J. Lopes},
  year = {1997},
  doi = {10.3133/ofr97223},
  url = {https://pubs.usgs.gov/publication/ofr97223},
  note = {Source identifier: ofr97223}
}