@misc{indiciae1d66cd860333,
  title = {Nitrate concentrations in Illinois rivers 1967 to 1974: Comparison among reporting agencies},
  author = {G.F. McIsaac and M.B. Short and G. Groschen and P. Terrio},
  year = {2007},
  doi = {10.1111/j.1752-1688.2004.tb01042.x},
  url = {https://pubs.usgs.gov/publication/70026898},
  note = {Source identifier: 70026898}
}