@misc{indiciae3197315d6691,
  title = {Ground water age and nitrate distribution within a glacial aquifer beneath a thick unsaturated zone},
  author = {C.T. Johnston and P.G. Cook and S.K. Frape and Niel Plummer and Eurybiades Busenberg and R.J. Blackport},
  year = {2005},
  doi = {10.1111/j.1745-6584.1998.tb01078.x},
  url = {https://pubs.usgs.gov/publication/70020680},
  note = {Source identifier: 70020680}
}