@misc{indiciaed0da73c57e61,
  title = {Are shifts in herbicide use reflected in concentration changes in Midwestern rivers?},
  author = {W.A. Battaglin and D. A. Goolsby},
  year = {1999},
  doi = {10.1021/es9900149},
  url = {https://pubs.usgs.gov/publication/70021522},
  note = {Source identifier: 70021522}
}