Columbia subject headings:
Harvard subject headings:
Germany--Politics and government--21st century.
Piratenpartei Deutschland.
Political participation--Germany--History--21st century.
Political parties--Germany--History--21st century.
Princeton subject headings:
Germany--Politics and government--21st century.
Piratenpartei Deutschland.
Political participation--Germany--History--21st century.
Political parties--Germany--History--21st century.