Columbia subject headings:
Democratization.
Nineteen eighty-nine, A.D.
Post-communism.
Revolutions--History--20th century.
Revolutions--History--21st century.
Social movements--History--20th century.
Social movements--History--21st century.
World politics--1989-
Harvard subject headings:
Democratization
Nineteen eighty-nine, A.D.
Post-communism
Revolutions--History--20th century
Revolutions--History--21st century.
Social movements--History--20th century.
Social movements--History--21st century.
World politics--1989-
Princeton subject headings:
Democratization.
Nineteen eighty-nine, A.D.
Post-communism.
Revolutions--History--20th century.
Revolutions--History--21st century.
Social movements--History--20th century.
Social movements--History--21st century.
World politics--1989-