Classification
EHA - Renewable energy sources
3
FGGJ - Ion beam analysis, ion beam solid interaction
2
ASDB - Literary history
1
ASEB - Book trade
1
DKAE - Windows
1
EVA - Energy demand, energy supply - comprehensive works
1
EXA - Energy policy
1
FLGD - Superconducting devices, circuits
1
LKHE - Biochemistry - analytical methods
1
MSU - Economic analysis
1
TKB - Civil engineering - buildings
1
YPB - Economy - general aspects
1