Classification
ETC - Energy conversion
EXA - Energy policy
14
EGA - Oil shale, oil sands
4
TKH - Air flight, space flight
4
ETF - Fuel cells - general
3
CLG - Catalysis - surveys, general aspects
1
CNJ - Electrochemistry - comprehensive works
1
CNR - Electrodes
1
CNW - Electrochemical energy production and conversion
1
CNWK - Electric batteries
1
EHA - Renewable energy sources
1
ETA - Energy storage
1
EUA - Energy conservation - general
1
FJEG - Organic semiconductors, one dimensional conductors
1
FNC - Molecular crystals, organic crystals
1
FNF - Polymer science - general aspects
1
TKJ - Traffic
1
TNA - Nuclear engineering - general
1
UKB - Environmental effects and energy
1
UMB - Atmospheric chemistry
1
UMD - Atmospheric models
1
UMN - Air pollution control and measurement
1