MODFLOW Instructional Manual
The MODFLOW manual is a study guide for the U.S. Geological Survey MODFLOW model. The manual contains a series of 20 problem sets that illustrate by example the use of MODFLOW, including modeling principles, input/output specifics, available options, rules of thumb, and common modeling mistakes.
US EPA. (1993) "A Manual of Instructional Problems for the USGS MODFLOW Model. Publication No. EPA/600/R-93/010.