TY - RPRT TI - A Deep Percolation Model for Estimating Ground-Water Recharge: Documentation of Modules for the Modular Modeling System of the U.S. Geological Survey AU - J. J. Vaccaro PY - 2007 DO - 10.3133/sir20065318 UR - https://pubs.usgs.gov/publication/sir20065318 ID - sir20065318 ER -