01133nam a2200253 a 4500008004100000010001300041020001500054040002800069082001700097245014100114250001300255260004600268300004000314500014700354504005100501650003100552650002600583700002800609700002500637710004200662710005500704710003100759856008900790111222s1997    enkab    b    001 0 eng d  a98123030  a0419229108  aDLCcDLCdDLCdBD-KhUET00a363.739422100aWater pollution control :ba guide to the use of water quality management principles /cedited by Richard Helmer and Ivanildo Hespanhol.  a1st. ed.  aLondon ;aNew York :bE & FN Spon,c1997.  axvi, 510 p. :bill., maps ;c24 cm.  a"Published on behalf of UNEP, United Nations Environment Program, Water Supply & Sanitation Collaborative Council, World Health Organization."  aIncludes bibliographical references and index. 0a Water quality management. 0a Water2Purification.1 aHelmer, Richard,d1943-1 aHespanhol, Ivanildo.  aUnited Nations Environment Programme.2 aWater Supply and Sanitation Collaborative Council.2 aWorld Health Organization.  3Publisher descriptionuhttp://www.loc.gov/catdir/enhancements/fy0651/98123030-d.html