TY - RPRT TI - Simulation of ground-water flow in the Shenandoah Valley, Virginia and West Virginia, using variable-direction anisotropy in hydraulic conductivity to represent bedrock structure AU - Richard M. Yager AU - Scott C. Southworth AU - Clifford I. Voss PY - 2008 DO - 10.3133/sir20085002 UR - https://pubs.usgs.gov/publication/sir20085002 ID - sir20085002 ER -