Classification
GKA - Geophysics - general
149
GAN - Geosciences - mathematical methods, computer applications
10
GMA - Geochemistry - general
10
GRA - Meteorology
9
GTAK - Hydrogeology
7
GVA - Oceanography
6
GRAD - Earth atmosphere, weather
5
UMC - Atmospheric physics
5
GDAB - Rock mechanics, soil mechanics
4
GBH - Marine geology
3
GHH - Sedimentary petrography - general
3
GBA - General geology, historical geology
2
GBE - Geology - endogene processes, exogene processes
2
GDA - Engineering geology - general
2
GKKE - Seismic exploration
2
GTA - Hydrology - general
2
GXAB - Polar research - antarctic region
2
MFB - Linear algebra
2
PAD - Physics - comprehensive works
2
PCA - Thermodynamics
2
PLA - Astrosciences - general
2
CHG - Physical chemistry - general aspects
1
CR - Nuclear chemistry, radiation chemistry
1
CT - Chemical methods of materials analysis
1
CXK - Coal gasification
1
EXA - Energy policy
1
FCA - Crystallography
1
GBED - Glaciology
1
GBHB - Geology of continental shelves
1
GCAB - Regional geology - european countries
1
GDAC - Seismicity, earthquake engineering
1
GFAA - General mineralogy
1
GHA - Petrology - general
1
GHAB - Rocks - physical properties
1
GHF - Igneous rocks, metamorphic rocks
1
GKAB - Geothermics
1
GKAF - Geomagnetism
1
GKAH - Gravitation
1
GKK - Geophysics - applications
1
GKKC - Geoelectric methods
1
GKKD - Gravimetry
1
GNA - Geology - soil sciences
1
GPA - Geobiology - general
1
GRB - Climatology
1
GSA - Applied geodesy
1
GSC - Remote sensing
1
GWAA - Raw material programs
1
GWC - Ore deposits
1
GWCC - Exploration and evaluation of ore deposits
1
GXA - Polar research - general
1
more ...