@misc{indiciae8c91390c7104,
  title = {Dating young groundwater with sulfur hexafluoride: Natural and anthropogenic sources of sulfur hexafluoride},
  author = {Eurybiades Busenberg and Niel Plummer},
  year = {2000},
  doi = {10.1029/2000wr900151},
  url = {https://pubs.usgs.gov/publication/70022588},
  note = {Source identifier: 70022588}
}