Columbia subject headings:
Developing countries--Social conditions--Congresses.
Economic development--Congresses.
Social change--Congresses.
Social history--20th century--Congresses.
Harvard subject headings:
Developing countries--Congresses.
Economic development--Congresses
Social change--Congresses
Social history--20th century--Congresses.
Princeton subject headings:
Developing countries--Congresses.
Development--Congresses.
Economic development--Congresses.
Social change--Congresses.
Social history--20th century--Congresses.