@misc{indiciaebf5f386c4110,
  title = {Methodology to derive water-quality trends for use by the National Water Summary Program of the U.S. Geological Survey},
  author = {K.J. Lanfear and R. Alexander},
  year = {1990},
  doi = {10.3133/ofr90359},
  url = {https://pubs.usgs.gov/publication/ofr90359},
  note = {Source identifier: ofr90359}
}