Water treatment : how can we purify our water? / Susan E. Kegley...[et al.]. - 3rd. ed. - New York John Wiley and Sons Ltd. 2000. - xiv, 178p. ill. 28cm ISBN: 0471349305 Subjects--Topical Terms: Water supply--TreatmentWater--Purification Dewey Class. No.: 628.1618 WAT 2000