@misc{indiciae6714d1c99388,
  title = {Temporal changes in nitrogen and phosphorus concentrations with comparisons to conservation practices and agricultural activities in the Lower Grand River, Missouri and Iowa, and selected watersheds, 1969–2015},
  author = {Heather M. Krempa and Allison K. Flickinger},
  year = {2017},
  doi = {10.3133/sir20175067},
  url = {https://pubs.usgs.gov/publication/sir20175067},
  note = {Source identifier: sir20175067}
}