a guide to the use of water quality management principles Helmer, Richard 1943- Hespanhol, Ivanildo. United Nations Environment Programme Water Supply and Sanitation Collaborative Council World Health Organization text bibliography enk London New York E & FN Spon 1997 1st. ed. monographic eng

print

xvi, 510 p. : ill., maps ; 24 cm. edited by Richard Helmer and Ivanildo Hespanhol. "Published on behalf of UNEP, United Nations Environment Program, Water Supply & Sanitation Collaborative Council, World Health Organization." Includes bibliographical references and index. Water quality management Water 363.7394 0419229108 98123030 http://www.loc.gov/catdir/enhancements/fy0651/98123030-d.html http://www.loc.gov/catdir/enhancements/fy0651/98123030-d.html DLC 111222