@misc{indiciaeb6906c9659ac,
  title = {Use of isotopically labeled fertilizer to trace nitrogen fertilizer contributions to surface, soil, and ground water},
  author = {D.H. Wilkison and D. W. Blevins and S. R. Silva},
  year = {2000},
  url = {https://pubs.usgs.gov/publication/70010279},
  note = {Source identifier: 70010279}
}