TY - RPRT TI - Base-flow characteristics of streams in the Valley and Ridge, the Blue Ridge, and the Piedmont physiographic provinces of Virginia AU - David L. Nelms AU - George E. Harlow AU - Donald C. Hayes PY - 1997 DO - 10.3133/wsp2457 UR - https://pubs.usgs.gov/publication/wsp2457 ID - wsp2457 ER -