@article{200665, note = {"A contribution of the Regional Aquifer-System Analysis Program."}, author = {Hansen, Arnold J.,}, url = {http://library.usi.edu/record/200665}, title = {Modifications to the modular three-dimensional finite-difference ground-water flow model used for the Columbia Plateau regional aquifer-system analysis, Washington, Oregon, and Idaho [microform] /}, publisher = {U.S. Dept. of the Interior, U.S. Geological Survey ;}, recid = {200665}, pages = {iv, 162 p. :}, address = {Tacoma, Wash. :}, year = {1993}, }