@misc{indiciae45c20a7d56b0,
  title = {Agricultural chemicals in ground and surface water in a small watershed in Clayton County, Iowa, 1988-91},
  author = {S. J. Kalkhoff and B.D. Schaap},
  year = {1995},
  doi = {10.3133/wri954158},
  url = {https://pubs.usgs.gov/publication/wri954158},
  note = {Source identifier: wri954158}
}