Classification
GKA - Geophysics - general
2
GTAK - Hydrogeology
2
GAN - Geosciences - mathematical methods, computer applications
1
GRBA - Climatology - general
1
GTAP - Hydrological investigation methods
1
UAN - Environment - mathematical methods, computer applications
1
UPN - Water protection, water quality, clean water
1
UPVC - Groundwater
1
USNG - Waste water treatment - biological aspects
1
USNH - Waste water treatment - special methods
1