@misc{indiciae40772042aa6f,
  title = {Quality assurance practices for the chemical and biological analyses of water and fluvial sediments},
  author = {Linda C. Friedman and David E. Erdman},
  year = {1981},
  doi = {10.3133/ofr81650},
  url = {https://pubs.usgs.gov/publication/ofr81650},
  note = {Source identifier: ofr81650}
}