Columbia subject headings:
Harvard subject headings:
Left-wing extremists--Germany--History--20th century.
Rote Armee Fraktion--History.
Terrorism--Germany--History--20th century.
Terrorist organizations--Germany--History--20th century.
Princeton subject headings:
Left-wing extremists--Germany--History--20th century.
Rote Armee Fraktion--History.
Terrorism--Germany--History--20th century.