Classification
CHRV - Water and its properties
UPCE - Water chemistry
4
UPT - Water pollution control and measurement
3
UPK - Water resources, water supply
1
UPN - Water protection, water quality, clean water
1
UPP - Water pollution
1
UPTF - Organic pollutants in water
1
UPTK - Volatile pollutants in water
1
UPTN - Inorganic pollutants in water
1
YEC - Law on waters
1