Classification
GCAA - Regional geology - Germany
104
GTAK - Hydrogeology
6
GBA - General geology, historical geology
5
GBAH - Stratigraphy, history of earth
5
GNA - Geology - soil sciences
5
UPVC - Groundwater
5
GBAK - Paleontology
4
GTA - Hydrology - general
4
GBEN - Tectonics
3
GDA - Engineering geology - general
3
GWBA - Raw material resources, raw material reserves
3
LCP - Limnology
3
UPVF - Surface waters - streams, rivers, lakes
3
EFK - Petroleum deposits, natural gas deposits
2
GAN - Geosciences - mathematical methods, computer applications
2
GHH - Sedimentary petrography - general
2
GHHF - Sedimentary basins
2
GUAC - Geography - cartography
2
UCJ - Environmental protection - general aspects
2
UHP - Protection of nature and landscape
2
UPK - Water resources, water supply
2
AAD - General handbooks of knowledge
1
EEA - Coal - general
1
EFE - Petroleum geology
1
EKA - Wind energy
1
FEJP - Porous media, capillarity
1
GBAA - Geology - textbooks
1
GBEU - Weathering
1
GCAB - Regional geology - european countries
1
GDAC - Seismicity, earthquake engineering
1
GFA - Mineralogy - general
1
GFAA - General mineralogy
1
GFAC - Specific minerals
1
GHA - Petrology - general
1
GHM - Sedimentary rocks
1
GHMA - Clay, shale
1
GMK - Geochemistry of elements, minerals, rocks
1
GPAB - Flora, vegetation - geographical aspects
1
GRA - Meteorology
1
GRAN - Wind
1
GRB - Climatology
1
GUA - Geography - general
1
GVA - Oceanography
1
GWA - Raw material economy, raw material policy
1
GWC - Ore deposits
1
UHN - Landscape ecology
1
UPC - Water - general aspects
1
UPN - Water protection, water quality, clean water
1
URA - Soil chemistry
1
YUS - Other statistical data
1