Classification
EIA - Solar energy - general
166
EHA - Renewable energy sources
4
EIP - Photovoltaics
4
EKA - Wind energy
4
LEP - Photosynthesis
3
CMDS - Photochemical processes in nature and technology
2
EBA - Energy production, energy technology
2
EIK - Solar energy application
2
EIS - Solar cells
2
ELA - Geothermal energy
2
ENA - Energy from biomass and waste
2
ETA - Energy storage
2
UKE - Environment and energy resources
2
YPO - Economic policy
2
ACA - Languages, dictionaries - general
1
AZZ - Firm index - general
1
CHXP - Thermochemistry
1
CMD - Photochemistry - special aspects
1
CNE - Electrochemistry
1
EAB - Energy - dictionaries
1
EIC - Solar thermal energy conversion
1
EMA - Hydroelectric, tidal energy
1
EPK - Nuclear energy
1
EVN - Energy supply - future aspects
1
GRAD - Earth atmosphere, weather
1
LWF - Agriculture - methods
1
PLA - Astrosciences - general
1
UHCH - Urban areas
1
YRG - Technology transfer
1