Classification
ENA - Energy from biomass and waste
1
EUA - Energy conservation - general
1
GBE - Geology - endogene processes, exogene processes
1
GBEN - Tectonics
1
PDA - Mechanics - general
1
PDBJ - Mechanical waves
1
PJA - Atomic physics - general
1
PLA - Astrosciences - general
1
UCA - Environmental problems, man and environment - general aspects
1
UMV - Climatic change
1