Classification
GVA - Oceanography
25
LCQ - Marine research
23
GBH - Marine geology
16
LCO - Hydrobiology
8
UPVN - Ocean water, coastal waters
6
GPAC - Aquatic biology - geographical aspects
5
GXAB - Polar research - antarctic region
5
LWY - Fishery and aquaculture
5
GRB - Climatology
4
LCL - Biotopes, ecosystems
4
LCR - Ecology of microorganisms - land and water
4
LKD - Biochemistry - comprehensive works
4
LCK - Ecology - general aspects
3
LGA - Zoology - reference books
3
LGN - Zoology - anatomy, systematics, embryology
3
LTE - Biotechnology - general aspects
3
GKA - Geophysics - general
2
HPK - Special pharmacology, drug design
2
HTE - Oncology - general
2
LCP - Limnology
2
LEO - Chemical compounds from plants
2
LHH - Microbiology - methods
2
LMRC - Membrane transport
2
UUD - Ecotoxicology
2
AFC - Research institutions, scientific organizations - Germany ( DFG, MPG, FHG )
1
AFW - Subject oriented organizations
1
AHPC - Ethics
1
CXUX - Natural products
1
ETC - Energy conversion
1
GAN - Geosciences - mathematical methods, computer applications
1
GBC - Paleoclimatology
1
GBHA - Geology of coasts, geology of estuaries
1
GBHC - Ocean floor - sediments, morphology
1
GCA - Regional geology
1
GHHD - Sedimentary transport, sedimentation
1
GHHF - Sedimentary basins
1
GMA - Geochemistry - general
1
GMAD - Organic geochemistry
1
GRA - Meteorology
1
GTAP - Hydrological investigation methods
1
GXAA - Polar research - arctic region
1
HAA - Medicine - reference books
1
HTJ - Tumors
1
L - Life sciences ( journals )
1
LAN - Biology - mathematical methods, statistics
1
LCH - Ecology - methods
1
LCM - Terrestrial ecology
1
LEE - Botany - general aspects
1
LEK - Botany - systematics, taxonomy
1
LES - Plant physiology - methods
1
more ...