@misc{indiciae7532dc7406ad,
  title = {Dating groundwater with trifluoromethyl sulfurpentafluoride (SF 5CF3), sulfur hexafluoride (SF6), CF 3Cl (CFC-13), and CF2Cl2 (CFC-12)},
  author = {E. Busenberg and Niel Plummer},
  year = {2008},
  doi = {10.1029/2007wr006150},
  url = {https://pubs.usgs.gov/publication/70033592},
  note = {Source identifier: 70033592}
}