@misc{indiciae9e214e19b81a,
  title = {Geographic and seasonal distribution of herbicides in streams of the midwestern United States},
  author = {D. A. Goolsby and E.M. Thurman and D.W. Kolpin},
  year = {1991},
  url = {https://pubs.usgs.gov/publication/70169935},
  note = {Source identifier: 70169935}
}