Columbia subject headings:
Harvard subject headings:
Developing countries--Congresses.
Developing countries--Social conditions--Congresses.
International economic relations--Congresses
Technology--Social aspects--Developing countries--Congresses.
Princeton subject headings:
Developing countries--Congresses.
Developing countries--Social conditions--Congresses.
International economic relations--Congresses.
Technology--Social aspects--Developing countries--Congresses.