Columbia subject headings:
Harvard subject headings:
Democracy--History--20th century
Political culture--History--20th century.
Political sociology--History--20th century.
Protest movements--History--20th century.
Right-wing extremists--History--20th century.
Social movements--History--20th century.
Princeton subject headings:
Democracy--History--20th century.
Political culture--History--20th century.
Political sociology--History--20th century.
Protest movements--History--20th century.
Right-wing extremists--History--20th century.
Social movements--History--20th century.