Classification
UPT - Water pollution control and measurement
16
UPCE - Water chemistry
13
CXW - Water and seawater desalination - chemistry and technology
3
UPW - Drinking water
3
UPN - Water protection, water quality, clean water
2
UPC - Water - general aspects
1
UPTF - Organic pollutants in water
1
UPTN - Inorganic pollutants in water
1