Classification
GVA - Oceanography
66
GBH - Marine geology
53
GBHC - Ocean floor - sediments, morphology
31
GHHD - Sedimentary transport, sedimentation
22
GBA - General geology, historical geology
21
GHH - Sedimentary petrography - general
20
GBAH - Stratigraphy, history of earth
14
GBAK - Paleontology
13
GMAD - Organic geochemistry
12
GHHF - Sedimentary basins
10
GMAB - Hydrogeochemistry
9
UPVF - Surface waters - streams, rivers, lakes
9
GCAA - Regional geology - Germany
8
GHM - Sedimentary rocks
8
GBC - Paleoclimatology
7
GHHM - Diagenesis
7
GMK - Geochemistry of elements, minerals, rocks
7
GAN - Geosciences - mathematical methods, computer applications
6
GMA - Geochemistry - general
6
GNA - Geology - soil sciences
6
GTA - Hydrology - general
6
UPK - Water resources, water supply
6
UPN - Water protection, water quality, clean water
6
URA - Soil chemistry
6
GDA - Engineering geology - general
5
GKA - Geophysics - general
5
GUAA - Geography - physical
5
GKKA - Geophysical well logging
4
GMP - Geochemical exploration
4
UHN - Landscape ecology
4
UPP - Water pollution
4
USGH - Contaminated sites
4
AFK - Research institutions - Germany
3
CWO - Separation and combination processes - mechanical
3
EFE - Petroleum geology
3
GBE - Geology - endogene processes, exogene processes
3
GBED - Glaciology
3
GCA - Regional geology
3
GCAC - Regional geology - noneuropean countries
3
GMAC - Isotope geochemistry
3
UCEB - Environmental pollution
3
UPT - Water pollution control and measurement
3
UPTF - Organic pollutants in water
3
UPVN - Ocean water, coastal waters
3
CLP - Colloid chemistry, surface chemistry
2
CTA - Chemical analysis - comprehensive works
2
GBEC - Geomorphology
2
GBEE - Isotope geology
2
GBEN - Tectonics
2
GBHA - Geology of coasts, geology of estuaries
2
more ...