TY - RPRT TI - MODFLOW-2000, the U.S. Geological Survey modular ground-water model; user guide to the observation, sensitivity, and parameter-estimation processes and three post-processing programs AU - Mary C. Hill AU - E. R. Banta AU - A.W. Harbaugh AU - E.R. Anderman PY - 2000 DO - 10.3133/ofr00184 UR - https://pubs.usgs.gov/publication/ofr00184 ID - ofr00184 ER -