@misc{indiciaed6604b9397f8,
  title = {Assessment of nonpoint-source contamination of the High Plains Aquifer in south-central Kansas, 1987},
  author = {John O. Helgesen and Lloyd E. Stullken and A. T. Rutledge},
  year = {1992},
  doi = {10.3133/ofr91238},
  url = {https://pubs.usgs.gov/publication/ofr91238},
  note = {Source identifier: ofr91238}
}