Classification
GNA - Geology - soil sciences
308
GBA - General geology, historical geology
165
GVA - Oceanography
159
GBH - Marine geology
152
GDA - Engineering geology - general
140
URA - Soil chemistry
112
GCAA - Regional geology - Germany
104
GAN - Geosciences - mathematical methods, computer applications
77
GCAC - Regional geology - noneuropean countries
66
LWH - Agriculture - soil sciences
65
GBHC - Ocean floor - sediments, morphology
62
EFE - Petroleum geology
59
GBE - Geology - endogene processes, exogene processes
59
GBAH - Stratigraphy, history of earth
51
GWBA - Raw material resources, raw material reserves
46
GCAB - Regional geology - european countries
41
GMAD - Organic geochemistry
38
LCN - Ecology - soil sciences
38
GWA - Raw material economy, raw material policy
30
GHH - Sedimentary petrography - general
29
GBEE - Isotope geology
28
GMK - Geochemistry of elements, minerals, rocks
28
GMP - Geochemical exploration
28
GTAK - Hydrogeology
27
UXW - Underground disposal of radioactive waste
26
GCA - Regional geology
25
EFA - Petroleum, natural gas
24
GBAK - Paleontology
24
GHHF - Sedimentary basins
23
GMA - Geochemistry - general
22
GBEN - Tectonics
21
GHA - Petrology - general
21
GKA - Geophysics - general
21
GTA - Hydrology - general
21
GWC - Ore deposits
20
UXV - Radioactive waste disposal - interim and final
20
GKKA - Geophysical well logging
19
GMAC - Isotope geochemistry
18
GAA - Geosciences - reference books
16
GBAA - Geology - textbooks
16
GBC - Paleoclimatology
16
GKK - Geophysics - applications
16
UPVC - Groundwater
16
GBHB - Geology of continental shelves
15
GWB - Raw materials - metals, nonmetals
15
G - Geosciences ( journals )
14
GHHD - Sedimentary transport, sedimentation
14
GBHA - Geology of coasts, geology of estuaries
13
GFA - Mineralogy - general
13
GHM - Sedimentary rocks
13
more ...