@misc{indiciaef3976816449c,
  title = {Effects of climatic variations over 11 years on nitrate-nitrogen concentrations in the Raccoon River, Iowa},
  author = {K.J. Lucey and D. A. Goolsby},
  year = {1993},
  doi = {10.2134/jeq1993.00472425002200010005x},
  url = {https://pubs.usgs.gov/publication/70017727},
  note = {Source identifier: 70017727}
}