TY - RPRT TI - Conceptual Model and Numerical Simulation of the Ground-Water-Flow System in the Unconsolidated Sediments of Thurston County, Washington AU - B. W. Drost AU - D.M. Ely AU - W. E. Lum PY - 1999 DO - 10.3133/wri994165 UR - https://pubs.usgs.gov/publication/wri994165 ID - wri994165 ER -