Classification
UCL - Environmental research
102
UCJ - Environmental protection - general aspects
10
UCA - Environmental problems, man and environment - general aspects
8
UEG - Environmental programs and expertises
7
UCN - Environmental education
6
UCE - Environmental impact, environmental pollution
5
LCK - Ecology - general aspects
4
UEF - Sustainability
4
LWV - Agriculture - plant protection
3
UCQ - Environmental technology
3
UEND - Environmental costs, environmental investments
3
UKE - Environment and energy resources
3
AFG - Large scale research institutions (Helmholtz Centres)
2
LCO - Hydrobiology
2
UAN - Environment - mathematical methods, computer applications
2
UCS - Environmental chemistry
2
UEN - Environmental economy
2
UMRC - Effects of air pollution on plants and animals
2
UVC - Environmental chemicals, hazardous materials - general aspects
2
AEG - Official corporations - Germany
1
AFK - Research institutions - Germany
1
AHA - Research and development, research politics - general
1
AHF - Research and science
1
CT - Chemical methods of materials analysis
1
EEA - Coal - general
1
GBHA - Geology of coasts, geology of estuaries
1
GRBA - Climatology - general
1
GSC - Remote sensing
1
HBA - Medical physics
1
HYE - Environmental health
1
LCD - Ecology - comprensive works
1
LCM - Terrestrial ecology
1
LCP - Limnology
1
LCR - Ecology of microorganisms - land and water
1
LKH - Biochemistry - methods
1
LTE - Biotechnology - general aspects
1
LTH - Biotechnology - methods
1
LWW - Agriculture - transfer factors, radioagronomy
1
UAA - Environment - reference books
1
UAD - Environment - comprehensive works
1
UAX - Environment - information systems, literature guides
1
UCEA - Environmental impact
1
UED - Environmental policy
1
UHP - Protection of nature and landscape
1
UKA - Environmental damage and energy production
1
UKH - Environment and power plants, industrial plants
1
UMB - Atmospheric chemistry
1
UMGH - Gas cleaning
1
UMN - Air pollution control and measurement
1
UPC - Water - general aspects
1
more ...