@misc{indiciae8b2225b0ee15,
  title = {Direct assessment of groundwater vulnerability from single observations of multiple contaminants},
  author = {Fred Worrall and Dana W. Kolpin},
  year = {2003},
  doi = {10.1029/2002wr001212},
  url = {https://pubs.usgs.gov/publication/70025282},
  note = {Source identifier: 70025282}
}