@misc{indiciae7514924cdce6,
  title = {Methods of analysis by the U.S. Geological Survey Organic Geochemistry Research Group: Determination of triazine and phenylurea herbicides and their degradation products in water using solid-phase extraction and liquid chromatography/mass spectrometry},
  author = {Edward Alan Lee and Alex P. Strahan and Earl Michael Thurman},
  year = {2002},
  doi = {10.3133/ofr02436},
  url = {https://pubs.usgs.gov/publication/ofr02436},
  note = {Source identifier: ofr02436}
}