@misc{indiciaef7641b1a3a44,
  title = {Method of analysis and quality-assurance practices by the U. S. Geological Survey Organic Geochemistry Research Group—Determination of four selected mosquito insecticides and a synergist in water using liquid-liquid extraction and gas chromatography/mass spectrometry},
  author = {L.R. Zimmerman and A.P. Strahan and E.M. Thurman},
  year = {2001},
  doi = {10.3133/ofr01273},
  url = {https://pubs.usgs.gov/publication/ofr01273},
  note = {Source identifier: ofr01273}
}