@misc{indiciaea51322946288,
  title = {Models of groundwater ages and residence times},
  author = {D. K. Solomon and L.N. Plummer and Eurybiades Busenberg and P.G. Cook},
  year = {2006},
  url = {https://pubs.usgs.gov/publication/70198534},
  note = {Source identifier: 70198534}
}