@misc{indiciaeab920e56edb7,
  title = {Groundwater quality in the Valley and Ridge and Piedmont and Blue Ridge carbonate-rock aquifers, eastern United States},
  author = {Bruce D. Lindsey and Kenneth Belitz},
  year = {2017},
  doi = {10.3133/fs20163079},
  url = {https://pubs.usgs.gov/publication/fs20163079},
  note = {Source identifier: fs20163079}
}