@misc{indiciaeee8b83aa8c9f,
  title = {Translating CFC-based piston ages into probability density functions of ground-water age in karst},
  author = {Andrew J. Long and L.D. Putnam},
  year = {2006},
  doi = {10.1016/j.jhydrol.2006.05.004},
  url = {https://pubs.usgs.gov/publication/70028984},
  note = {Source identifier: 70028984}
}