@misc{indiciaee078b51df983,
  title = {Nitrogen dynamics in the tidal freshwater Potomac River, Maryland and Virginia, water years 1979-81},
  author = {David J. Shultz},
  year = {1989},
  doi = {10.3133/wsp2234j},
  url = {https://pubs.usgs.gov/publication/wsp2234J},
  note = {Source identifier: wsp2234J}
}