@misc{indiciae1af5af635a27,
  title = {Temporal trends of selected agricultural chemicals in Iowa's groundwater, 1982-1995: Are things getting better?},
  author = {D.W. Kolpin and D. Sneck-Fahrer and G.R. Hallberg and R.D. Libra},
  year = {1997},
  doi = {10.2134/jeq1997.00472425002600040012x},
  url = {https://pubs.usgs.gov/publication/70019851},
  note = {Source identifier: 70019851}
}