Columbia subject headings:
Revolutions--Congresses.
Revolutions--Developing countries--Congresses.
Social change--Congresses.
Harvard subject headings:
Revolutions--Congresses
Revolutions--Developing countries--Congresses.
Social change--Congresses
Princeton subject headings:
Revolutions--Congresses.
Revolutions--Developing countries--Congresses.
Social change--Congresses.