@misc{indiciae36683a4b3848,
  title = {The deethylatrazine/atrazine ratio as an indicator of the onset of the spring flush of herbicides into surface water of the midwestern United States},
  author = {E.M. Thurman and J. D. Fallon},
  year = {1996},
  url = {https://pubs.usgs.gov/publication/70018587},
  note = {Source identifier: 70018587}
}