@misc{indiciaee5821a25a79b,
  title = {Altitude, age, and quality of groundwater, Papio-Missouri River Natural Resources District, eastern Nebraska, 1992 to 2009},
  author = {Virginia L. McGuire and Derek W. Ryter and Amanda S. Flynn},
  year = {2012},
  doi = {10.3133/sir20125036},
  url = {https://pubs.usgs.gov/publication/sir20125036},
  note = {Source identifier: sir20125036}
}