Gray, N F. Water technology : an introduction for scientists and engineers / N F Gray. - / . - New Delhi : Viva Books , 2000. - xi,548p. : charts,map,picts .,tables ; 24cm 1 CD . Includes bibliographical references and index ISBN: 8176491535 RS325.00 Subjects--Index Terms: WATER TECHNOLOGY Dewey Class. No.: 621.20422 / GRA/W