@misc{indiciae5e4414f2c998,
  title = {Effects of sampling strategies on estimates of annual mean herbicide concentrations in midwestern rivers},
  author = {W.A. Battaglin and L.E. Hay},
  year = {1996},
  doi = {10.1021/es950351r},
  url = {https://pubs.usgs.gov/publication/70019408},
  note = {Source identifier: 70019408}
}