@misc{indiciaefceed8a9e310,
  title = {Relating nitrogen sources and aquifer susceptibility to nitrate in shallow ground waters of the United States},
  author = {B. T. Nolan},
  year = {2005},
  doi = {10.1111/j.1745-6584.2001.tb02311.x},
  url = {https://pubs.usgs.gov/publication/70023970},
  note = {Source identifier: 70023970}
}