Classification
EHA - Renewable energy sources
41
E - Energy ( journals )
4
AZZ - Firm index - general
3
E
3
EVP - Energy models, energy system analysis
3
EXA - Energy policy
3
EAD - Energy - comprehensive works
2
EBA - Energy production, energy technology
2
EKA - Wind energy
2
EUC - Energy conservation - civil engineering
2
EAA - Energy - reference books
1
EIA - Solar energy - general
1
EIC - Solar thermal energy conversion
1
EIP - Photovoltaics
1
ENA - Energy from biomass and waste
1
ETF - Fuel cells - general
1
EUA - Energy conservation - general
1
EUU - Cogeneration
1
EVA - Energy demand, energy supply - comprehensive works
1
EVB - Energy supply of Germany
1
EVN - Energy supply - future aspects
1
EWA - Energy economy
1
TED - Electric power - industrial aspect
1
TEJ - Electric devices, mechanical devices, magnets, dielectrics
1
TGN - Control engineering
1
THS - Turbines, pumps
1
TKB - Civil engineering - buildings
1
TKD - Air conditioning, refrigeration
1
YEM - Energy law
1
YPB - Economy - general aspects
1