TY - RPRT TI - 1r2dinv: A finite-difference model for inverse analysis of two dimensional linear or radial groundwater flow AU - Geoffrey C. Bohling AU - J.J. Butler PY - 2001 DO - 10.1016/s0098-3004(01)00036-x UR - https://pubs.usgs.gov/publication/70023432 ID - 70023432 ER -