Columbia subject headings:
Harvard subject headings:
Energy policy--Germany
Industrial policy--Germany
Photovoltaic power generation--Government policy--Germany.
Photovoltaic power generation--Industrial applications--Germany.
Photovoltaic power systems--Government policy--Germany.
Solar energy policy--Germany.
Princeton subject headings:
Energy policy--Germany.
Industrial policy--Germany.
Photovoltaic power generation--Government policy--Germany.
Photovoltaic power generation--Industrial applications--Germany.
Photovoltaic power systems--Government policy--Germany.
Solar energy policy--Germany.