@misc{indiciaef1613e8ce412,
  title = {Methods for the determination of organic substances in water and fluvial sediments, USGS TWRI, Book 5, Laboratory analysis, Chapter A3},
  year = {1982},
  doi = {10.3133/ofr821004},
  url = {https://pubs.usgs.gov/publication/ofr821004},
  note = {Source identifier: ofr821004}
}