Thomas, Harold E. Conservation of ground water: a survey of the present ground-water situation in the United States / Harold E. Thomas - 1st. ed. - New York : McGraw-Hill , 1951 - xv, 327 p. : ill. ; 25 cm. - Sponsored by the Conservation Foundation . Includes bibliographical references and index. ISBN: 0837134315 Subjects--Topical Terms: Natural resourcesWaterGroundwaterWater supply Dewey Class. No.: 333.91 / THO