Classification
UPVC - Groundwater
7
GTAK - Hydrogeology
3
URA - Soil chemistry
3
GCAA - Regional geology - Germany
2
GTAP - Hydrological investigation methods
2
GNA - Geology - soil sciences
1
LWH - Agriculture - soil sciences
1
UPK - Water resources, water supply
1
UPN - Water protection, water quality, clean water
1
UPT - Water pollution control and measurement
1