Classification
AZZ - Firm index - general
7
LTA - Biotechnology - reference books
7
EUA - Energy conservation - general
6
UED - Environmental policy
4
ABA - General international and supranational biographic catalogues
3
ABM - Special subject biographies
3
UMV - Climatic change
3
YPB - Economy - general aspects
3
EBA - Energy production, energy technology
2
EVA - Energy demand, energy supply - comprehensive works
2
EVP - Energy models, energy system analysis
2
TIA - Industrial engineering - general
2
UEF - Sustainability
2
UEN - Environmental economy
2
UKA - Environmental damage and energy production
2
YRC - Technology and society
2
YUD - Comprehensive statistical data - Germany
2
YZA - Politics, political science
2
AAD - General handbooks of knowledge
1
AHA - Research and development, research politics - general
1
AHF - Research and science
1
AXD - Local studies
1
CBM - Inorganic synthesis and reactions of the elements and their compounds - general aspects
1
CWSM - Separation by absorption or adsorption
1
DAE - Information technology - general
1
DMF - Software engineering
1
DZC - Man and computer
1
EAD - Energy - comprehensive works
1
EHA - Renewable energy sources
1
EUC - Energy conservation - civil engineering
1
EUD - Energy consumption
1
EVN - Energy supply - future aspects
1
FFJE - Molecular surface processes, gas surface interaction, adsorption
1
FMA - Metals, alloys - general (reports)
1
FMXH - Metal helium systems
1
HPE - Pharmacology - general aspects
1
LTO - Biotechnology - application, industry
1
MAE - Mathematics - general interest
1
PAE - Physics - general interest
1
PKA - Elementary particles, nuclei - general
1
TAT - Engineering Standards
1
TCQ - Process control computers, multiprocessors
1
TIE - Process engineering
1
TIG - Reliability, safety, quality control
1
TKJ - Traffic
1
UEG - Environmental programs and expertises
1
UHK - Traffic and environment - incl. automobile exhaust gas
1
UHN - Landscape ecology
1
UKE - Environment and energy resources
1
UMNE - Air pollution by gaseous pollutants
1
more ...