@misc{indiciae6aedabfed8c0,
  title = {Nonpoint-source agricultural chemicals in ground water in Nebraska; preliminary results for six areas of the High Plains Aquifer},
  author = {Hsiu-Hsiung Chen and A.D. Druliner},
  year = {1987},
  doi = {10.3133/wri864338},
  url = {https://pubs.usgs.gov/publication/wri864338},
  note = {Source identifier: wri864338}
}