Walton, William C. Groundwater resource evaluation / William C. Walton - New York : McGraw-Hill, 1970 - vi, 664 p. : ill., maps. ; 23 cm. - McGraw-Hill series in water resources and environmental engineering . Includes index ISBN: USD 18.60 Subjects--Topical Terms: GroundwaterWater-supply Dewey Class. No.: 553.79