@misc{indiciaef685a0a4e73d,
  title = {Vulnerability of recently recharged groundwater in principal aquifers of the United States to nitrate contamination},
  author = {Jason J. Gurdak and Sharon L. Qi},
  year = {2012},
  doi = {10.1021/es300688b},
  url = {https://pubs.usgs.gov/publication/70038287},
  note = {Source identifier: 70038287}
}