@misc{indiciae3438e34cc627,
  title = {Nutrient Trends in Streams and Rivers of the United States, 1993-2003},
  author = {Lori A. Sprague and David K. Mueller and Gregory E. Schwarz and David L. Lorenz},
  year = {2009},
  doi = {10.3133/sir20085202},
  url = {https://pubs.usgs.gov/publication/sir20085202},
  note = {Source identifier: sir20085202}
}