Classification
GPAB - Flora, vegetation - geographical aspects
34
LCMC - Plants - ecology
14
LEK - Botany - systematics, taxonomy
12
LCM - Terrestrial ecology
10
GSC - Remote sensing
9
LWE - Agriculture - general aspects
8
LCK - Ecology - general aspects
7
UHN - Landscape ecology
7
GPA - Geobiology - general
6
LCL - Biotopes, ecosystems
6
UMV - Climatic change
5
GTAP - Hydrological investigation methods
4
LVN - Food science - chemistry, analytics
4
USGH - Contaminated sites
4
GNA - Geology - soil sciences
3
GTA - Hydrology - general
3
GTAK - Hydrogeology
3
LCH - Ecology - methods
3
LED - Botany - comprehensive works
3
LEL - Botany - lower plants
3
LER - Plant physiology - ecological aspects
3
LET - Phytopathology
3
UCA - Environmental problems, man and environment - general aspects
3
UPVF - Surface waters - streams, rivers, lakes
3
GBC - Paleoclimatology
2
GMAB - Hydrogeochemistry
2
GRA - Meteorology
2
GRAK - Atmospheric precipitations
2
GRB - Climatology
2
GRBA - Climatology - general
2
GUAA - Geography - physical
2
LCO - Hydrobiology
2
LCP - Limnology
2
LEN - Plant physiology
2
LVE - Food science - general
2
LWH - Agriculture - soil sciences
2
LWV - Agriculture - plant protection
2
UAM - Environmental models
2
UCE - Environmental impact, environmental pollution
2
UCL - Environmental research
2
UCS - Environmental chemistry
2
UMN - Air pollution control and measurement
2
UMRC - Effects of air pollution on plants and animals
2
UPVC - Groundwater
2
UVF - Environmental aspects of heavy metals and their compounds
2
UXCD - Radioactive emission by nuclear facilities
2
AFK - Research institutions - Germany
1
CTA - Chemical analysis - comprehensive works
1
CTR - Chromatography
1
CTYH - Sampling and sample preparation in chemical analysis
1
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