@misc{indiciae32ffcbd7e699,
  title = {Nutrients in the Nation's Waters--Too Much of a Good Thing?},
  author = {David K. Mueller and Dennis R. Helsel},
  year = {1996},
  doi = {10.3133/cir1136},
  url = {https://pubs.usgs.gov/publication/cir1136},
  note = {Source identifier: cir1136}
}