@misc{indiciae878d0085986f,
  title = {Ionic composition and nitrate in drainage water from fields fertilized with different nitrogen sources, Middle Swamp watershed, North Carolina, August 2000-August 2001},
  author = {Stephen L. Harden and Timothy B. Spruill},
  year = {2004},
  doi = {10.3133/sir20045123},
  url = {https://pubs.usgs.gov/publication/sir20045123},
  note = {Source identifier: sir20045123}
}