Columbia subject headings:
Harvard subject headings:
Biomass energy industries--Germany.
Biomass energy--Government policy--Germany.
Energy development--Germany.
Energy policy--Social aspects--Germany.
Renewable energy sources--Government policy--Germany.
Princeton subject headings:
Biomass energy industries--Germany.
Biomass energy--Government policy--Germany.
Energy development--Germany.
Energy policy--Social aspects--Germany.
Renewable energy sources--Government policy--Germany.