@misc{indiciae31ec584cfe9e,
  title = {Trends in concentrations and use of agricultural herbicides for Corn Belt rivers, 1996-2006},
  author = {Aldo V. Vecchia and Robert J. Gilliom and Daniel J. Sullivan and David L. Lorenz and Jeffrey D. Martin},
  year = {2009},
  doi = {10.1021/es902122j},
  url = {https://pubs.usgs.gov/publication/70033809},
  note = {Source identifier: 70033809}
}