@misc{indiciaee4a87cb4357b,
  title = {Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2006},
  author = {Jeffrey D. Martin},
  year = {2009},
  doi = {10.3133/sir20095062},
  url = {https://pubs.usgs.gov/publication/sir20095062},
  note = {Source identifier: sir20095062}
}