Water Pollution Control - A Guide to the Use of Water Quality Management Principles

Water Pollution Control - A Guide to the Use of Water Quality Management Principles   - 

Edited by - Richard Helmer and Ivanildo Hespanhol

Published on behalf of

UNEP- United Nations Environment Programme

Water Supply & Sanitation Collaborative Council

World Health Organization

http://www.who.int/water_sanitation_health/resourcesquality/watpolcontrol.pdf