TY - RPRT TI - A modular three-dimensional finite-difference fround-water flow model AU - Michael G. McDonald AU - Arlen W. Harbaugh AU - Weixing Guo AU - Guoping Lu PY - 1988 DO - 10.3133/twri06a1_chinese UR - https://pubs.usgs.gov/publication/twri06A1_chinese ID - twri06A1_chinese ER -