Classification
GRAD - Earth atmosphere, weather
22
FMW - Rare earth materials
13
UMC - Atmospheric physics
7
FHN - Neutron scattering
6
FKMC - Magnetic ions, ESR in solids, crystal fields
5
GRB - Climatology
5
PKFD - Radiation detectors
5
GRA - Meteorology
4
CBRE - Complex compounds
3
FKCE - Random magnetic systems, mixed valence phenomena
3
GBC - Paleoclimatology
3
GWBA - Raw material resources, raw material reserves
3
PLA - Astrosciences - general
3
UMV - Climatic change
3
CWSH - Extraction
2
FAF - Materials research - comprehensive works
2
FHTD - Mössbauer spectroscopy
2
FHTH - Hyperfine interaction in solids
2
FJK - Specific semiconductor materials
2
FJLB - Physics of semiconductor devices
2
FKA - Magnetism - general aspects
2
FMS - Nonferrous metals, nonferrous alloys
2
GAN - Geosciences - mathematical methods, computer applications
2
GBAH - Stratigraphy, history of earth
2
GKA - Geophysics - general
2
GKAF - Geomagnetism
2
GKK - Geophysics - applications
2
GRBA - Climatology - general
2
GSC - Remote sensing
2
GWA - Raw material economy, raw material policy
2
PEC - Electromagnetic waves
2
PED - Particle radiation, particle optics
2
TBG - Transistors
2
TND - Gas cooled reactor types
2
UMB - Atmospheric chemistry
2
UMD - Atmospheric models
2
AAE - Popular science - general aspects
1
AFG - Large scale research institutions (Helmholtz Centres)
1
CBR - Inorganic synthesis and reactions of metals and their compounds
1
CHXJ - Chemical thermodynamics - special aspects
1
CTDK - Chemical analysis of single elements
1
CUKF - X-ray fluorescence analysis
1
CWSP - Ion exchange, ion exchange materials
1
FCG - Lattice dynamics
1
FFPE - Thin film electronic properties, semiconductor interfaces
1
FGCD - Crystal growth of specific substances
1
FJCK - Electrical conduction in solid materials
1
FJP - Optical materials, crystal optics
1
FKG - Magnetic materials
1
FKMF - NMR in solids, NQR
1
more ...