Malik, D. S. Kumar, Sunil Bharti, Umesh text New Delhi Biotech Books c2011 monographic x, 561 p. : ill. ; edited by D. S. Malik, Sunil Kumar and Umesh Bharti Includes bibliographies and index. Water Pollution Water quality management QH545.W3 W38 2011 363.7/394 9788176222273 83908599 UOEL 000 20170327110322.0 1894408