Classification
YBB - Law - general
YPB - Economy - general aspects
24
UA - Environment - general
23
YZA - Politics, political science
13
AHF - Research and science
12
MSU - Economic analysis
6
UEA - Environmental policy and economy - general aspects
4
UED - Environmental policy
4
EXA - Energy policy
3
UCJ - Environmental protection - general aspects
3
UVA - Environmental chemicals, hazardous materials - comprehensive works
3
YHJ - Copyright, press law
3
AMA - Education - general
2
HYG - Occupational medicine, sports medicine
2
TKJ - Traffic
2
UCA - Environmental problems, man and environment - general aspects
2
UMLE - Air pollution by power plants and industrial plants
2
UVC - Environmental chemicals, hazardous materials - general aspects
2
YDU - University and educational law
2
YRG - Technology transfer
2
AHX - History - general
1
AHZ - History of science and technology
1
AJA - Directories - general
1
CAV - Chemicals, chemical reagents
1
DAE - Information technology - general
1
DHA - Computer equipment and periphery
1
DWI - Information management
1
EBA - Energy production, energy technology
1
EFA - Petroleum, natural gas
1
EGA - Oil shale, oil sands
1
EPK - Nuclear energy
1
EUR - District heating
1
GDA - Engineering geology - general
1
GWBB - Raw material supply, raw material demand
1
HYB - Public health, health politics
1
LTU - Genetic engineering
1
MWB - Stochastic processes
1
MWE - Decision theory, game theory
1
MWHF - Experimental design, variance analysis
1
TAA - Engineering sciences - reference books
1
TCD - Communication systems
1
THH - Machines
1
THI - Robotics
1
TIA - Industrial engineering - general
1
TIG - Reliability, safety, quality control
1
TIH - Ergonomics, man machine systems
1
UAM - Environmental models
1
UCE - Environmental impact, environmental pollution
1
UCEA - Environmental impact
1
UCG - Control of environmental pollution
1
more ...