1
Handbook of water purity and quality /
Book
...UPN - Water protection, water quality, clean water...
Table of Contents 
2
Chemical water treatment: principles and practice.
Book
Roques, H.
1996
...UPN - Water protection, water quality, clean water...
3
Vom Wasser.
Book
...UPN - Water protection, water quality, clean water...
4
Gewässer als Ökosysteme: Grundlagen des Gewässerschutzes.
Book
...UPN - Water protection, water quality, clean water...