Summary of selected computer programs produced by the U.S. Geological Survey for simulation of ground-water flow and quality, 1994
by Charles A. Appel and Thomas E. Reilly.
- Washington, D.C. Denver, CO U.S. G.P.O. USGS Map Distribution 1994.
- iv, 98 p. 28 cm.
- U.S. Geological Survey circular 1104 .