@misc{indiciae6e3ac0693393,
  title = {Nonpoint source contamination of the Mississippi river and its tributaries by herbicides},
  author = {W. E. Pereira and F. D. Hostettler},
  year = {2002},
  doi = {10.1021/es00045a008},
  url = {https://pubs.usgs.gov/publication/70017959},
  note = {Source identifier: 70017959}
}