@misc{indiciaec7195dbf20c1,
  title = {Potential effects of regional pumpage on groundwater age distribution},
  author = {Brendan A. Zinn and Leonard F. Konikow},
  year = {2007},
  doi = {10.1029/2006wr004865},
  url = {https://pubs.usgs.gov/publication/70030186},
  note = {Source identifier: 70030186}
}