Columbia subject headings:
Harvard subject headings:
Bündnis 90/Die Grünen--History.
Freie Demokratische Partei--History.
Political parties--Germany--History--20th century
Political parties--Germany--History--21st century.
Princeton subject headings:
Bündnis 90/Die Grünen--History.
Freie Demokratische Partei--History.
Political parties--Germany--History.