@misc{indiciaec609d2bb4bf0,
  title = {Using multiple chemical indicators to assess sources of nitrate and age of groundwater in a karstic spring basin},
  author = {Brian Katz and R. Copeland and T. Greenhalgh and R. Ceryak and W. Zwanka},
  year = {2005},
  doi = {10.2113/11.4.333},
  url = {https://pubs.usgs.gov/publication/70027583},
  note = {Source identifier: 70027583}
}