Classification
UPVF - Surface waters - streams, rivers, lakes
13
GTA - Hydrology - general
12
UPN - Water protection, water quality, clean water
10
UPT - Water pollution control and measurement
10
UPP - Water pollution
8
UPK - Water resources, water supply
7
GTAP - Hydrological investigation methods
6
GAN - Geosciences - mathematical methods, computer applications
5
UHN - Landscape ecology
5
URA - Soil chemistry
5
UPVC - Groundwater
4
GMAB - Hydrogeochemistry
3
LCP - Limnology
3
UAN - Environment - mathematical methods, computer applications
3
UPCE - Water chemistry
3
UPTF - Organic pollutants in water
3
CTY - Analytical problems
2
GNA - Geology - soil sciences
2
GTAK - Hydrogeology
2
GVA - Oceanography
2
LWH - Agriculture - soil sciences
2
UCGE - Control of environmental pollution - analytical methods
2
UCS - Environmental chemistry
2
UPTN - Inorganic pollutants in water
2
UPVN - Ocean water, coastal waters
2
UUD - Ecotoxicology
2
UVC - Environmental chemicals, hazardous materials - general aspects
2
CAV - Chemicals, chemical reagents
1
CHTD - Chemistry of aqueous solutions
1
CHVN - Chemical equilibria
1
CNJ - Electrochemistry - comprehensive works
1
CTA - Chemical analysis - comprehensive works
1
CTR - Chromatography
1
CUA - Spectroscopy
1
CWM - Heat transfer, mass transfer - chemical aspects
1
GBH - Marine geology
1
GCAA - Regional geology - Germany
1
GHHD - Sedimentary transport, sedimentation
1
GMP - Geochemical exploration
1
GRAK - Atmospheric precipitations
1
GRBA - Climatology - general
1
GSC - Remote sensing
1
GXAB - Polar research - antarctic region
1
HBC - Physiological chemistry, biochemistry
1
HPT - Toxicology
1
HYE - Environmental health
1
LCO - Hydrobiology
1
LWP - Agriculture - animal husbandry
1
LWV - Agriculture - plant protection
1
LWVC - Plant protection
1
more ...