@misc{indiciae68598a0bd317,
  title = {Simulation of ground-water flow in the Shenandoah Valley, Virginia and West Virginia, using variable-direction anisotropy in hydraulic conductivity to represent bedrock structure},
  author = {Richard M. Yager and Scott C. Southworth and Clifford I. Voss},
  year = {2008},
  doi = {10.3133/sir20085002},
  url = {https://pubs.usgs.gov/publication/sir20085002},
  note = {Source identifier: sir20085002}
}