@misc{indiciae31fae38a99bb,
  title = {Characterization of Groundwater Quality Based on Regional Geologic Setting in the Piedmont and Blue Ridge Physiographic Provinces, North Carolina},
  author = {Stephen L. Harden and Melinda J. Chapman and Douglas A. Harned},
  year = {2009},
  doi = {10.3133/sir20095149},
  url = {https://pubs.usgs.gov/publication/sir20095149},
  note = {Source identifier: sir20095149}
}