Columbia subject headings:
Developing countries--Colonial influence--Congresses.
Developing countries--Social conditions--Congresses.
Imperialism--Social aspects--Congresses.
Harvard subject headings:
Developing countries--Colonial influence--Congresses.
Developing countries--Social conditions--Congresses.
Imperialism--Social aspects--Congresses.
Princeton subject headings:
Developing countries--Colonial influences--Congresses.
Developing countries--Social conditions--Congresses.
Imperialism--Social aspects--Congresses.