TY  - BOOK
AU  - Helmer,Richard
AU  - Hespanhol,Ivanildo
TI  - Water pollution control: a guide to the use of water quality management principles 
SN  - 0419229108
U1  - 363.739/4 
PY  - 1997///
CY  - London, New York
PB  - E & FN Spon
KW  - Water quality management
KW  - Water
N1  - "Published on behalf of UNEP, United Nations Environment Program, Water Supply & Sanitation Collaborative Council, World Health Organization."; Includes bibliographical references and index
UR  - http://www.loc.gov/catdir/enhancements/fy0651/98123030-d.html
ER  -