Classification
UPVC - Groundwater
2
AHA - Research and development, research politics - general
1
AHC - Research and development, research politics - Germany
1
CHRV - Water and its properties
1
GTA - Hydrology - general
1
HYB - Public health, health politics
1
UED - Environmental policy
1
UPC - Water - general aspects
1
UPCE - Water chemistry
1
UPK - Water resources, water supply
1
UPN - Water protection, water quality, clean water
1
UPT - Water pollution control and measurement
1
YEA - Environmental law
1
YZA - Politics, political science
1