Classification
UPT - Water pollution control and measurement
21
UPCE - Water chemistry
14
UPN - Water protection, water quality, clean water
3
UPW - Drinking water
3
CXW - Water and seawater desalination - chemistry and technology
2
UPC - Water - general aspects
2
UPTF - Organic pollutants in water
2
UPTN - Inorganic pollutants in water
2
CHRV - Water and its properties
1
CTYH - Sampling and sample preparation in chemical analysis
1
UCGE - Control of environmental pollution - analytical methods
1
UPK - Water resources, water supply
1
UPTK - Volatile pollutants in water
1
USN - Waste water treatment
1
YEC - Law on waters
1