Classification
DCA - Informatics - theoretical
2
ETF - Fuel cells - general
2
EHA - Renewable energy sources
1
EVA - Energy demand, energy supply - comprehensive works
1
EXA - Energy policy
1
PGNB - Fusion reactor materials
1
PKA - Elementary particles, nuclei - general
1
PKAE - Elementary particles, nuclei (reports)
1
PLA - Astrosciences - general
1
TEDD - Electric power transmission
1
YRA - Social studies
1