@misc{indiciaef8654a3097b4,
  title = {Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of triazine and other nitrogen-containing compounds by gas chromatography with nitrogen phosphorus detectors},
  author = {D.J. Markovchick and J.A. Lewis and R.W. Brenton and J.L. Iverson and H.L. Wharry},
  year = {1994},
  doi = {10.3133/ofr9437},
  url = {https://pubs.usgs.gov/publication/ofr9437},
  note = {Source identifier: ofr9437}
}