1
Fundamentals of water treatment unit processes : physical, chemical, and biological /
Book
...UPN - Water protection, water quality, clean water...
Table of Contents 
2
The world's water. 2008-2009 : the biennial report on freshwater resources /
Book
...UPN - Water protection, water quality, clean water...
3
The world's water. 2002-2003 : the biennial report on fresh water resources /
Book
...UPN - Water protection, water quality, clean water...
4
The world's water. 2000-2001 : the biennial report on fresh water resources /
Book
...UPN - Water protection, water quality, clean water...
5
Acidification of freshwater ecosystems: implications for the future : Dahlem workshop on acidification of freshwater ecosystems: report : Berlin, 27.09.92-02.10.92.
Book
...UPN - Water protection, water quality, clean water...
6
Handbuch der Frischwasser- und Abwasser-Biologie. 2 : Biologie des Trinkwassers, Badewassers, Frischwassers, Vorfluters und Abwassers : 85 Tabellen /
Book
...UPN - Water protection, water quality, clean water...