@misc{indiciae17dfdd44362d,
  title = {Distribution of selected nitrogen compounds in ground water and the unsaturated zone, Superior-Hardy Special Protection Area, Nuckolls County, Nebraska, 1991-93},
  author = {A. H. Chen},
  year = {1996},
  doi = {10.3133/wri964239},
  url = {https://pubs.usgs.gov/publication/wri964239},
  note = {Source identifier: wri964239}
}