Hammer, Mark J. Water and wastewater technology / Mark J. Hammer, Mark J. Hammer, Jr. - 4th ed. - New Delhi : Prentice Hall of India, c2001. - vii, 536 p. : ill., map ; 24 cm. Includes index. ISBN: 8120321081 (pbk.) Subjects--Topical Terms: Water-supply engineering.Sewage disposal.