Classification
GBAK - Paleontology
13
GBC - Paleoclimatology
7
GBHC - Ocean floor - sediments, morphology
4
GVA - Oceanography
4
GBA - General geology, historical geology
3
GBEE - Isotope geology
2
GCAA - Regional geology - Germany
2
GHHF - Sedimentary basins
2
GMAD - Organic geochemistry
2
GBH - Marine geology
1
GHHD - Sedimentary transport, sedimentation
1
GHM - Sedimentary rocks
1
GHMA - Clay, shale
1
GMAC - Isotope geochemistry
1
GMP - Geochemical exploration
1
GPA - Geobiology - general
1
GPAB - Flora, vegetation - geographical aspects
1
GRBK - Climatological data
1
GTAK - Hydrogeology
1
LBLC - Paleontology - biological aspects
1
LCK - Ecology - general aspects
1
LCMC - Plants - ecology
1
LKE - Biochemistry - general aspects
1
UCS - Environmental chemistry
1
UPCE - Water chemistry
1
UPK - Water resources, water supply
1
UPVF - Surface waters - streams, rivers, lakes
1