@misc{indiciae1be3435e8392,
  title = {Monitoring nutrients in the major rivers draining to Chesapeake Bay},
  author = {Donna L. Belval and Lori A. Sprague},
  year = {1999},
  doi = {10.3133/wri994238},
  url = {https://pubs.usgs.gov/publication/wri994238},
  note = {Source identifier: wri994238}
}