Item 9546Techniques of Water-Resources Investigations of the United States Geological Survey Chapter A1: A Modular Three-Dimensional Finite-Difference Ground-Water Flow MOdel
US Department of the Interior, 1988. Paperback, unpaginated. Minor wear and soiling to cardstock cover, superficial abrasions and reading creases to spine. Light soiling to text block edges. Infrequent highlighting and penciling to pages.