Water pollution control : a guide to the use of water quality man agement principles - Helmer, Richard, 1943-; Hespanhol, Ivanildo; United Nations Environment Programme; Water Supply and Sanitation Collaborative Council; World Health Organization (London ; New York : E & FN Spon, 1997)
"Published on behalf of UNEP, United Nations Environment Program, Wa ter Supply & Sanitation Collaborative Council, World Health Organizatio n."
Includes bibliographical references and index.
Keywords: Water quality management; Water -- Purification