Columbia subject headings:
Agriculture--Economic aspects--Developing countries--Congresses.
Economic development--Congresses.
Natural resources--Developing countries--Congresses.
Raw materials--Developing countries--Congresses.
Harvard subject headings:
Agriculture--Economic aspects--Developing countries--Congresses
Economic development--Congresses
Natural resources--Developing countries--Congresses.
Raw materials--Developing countries--Congresses.
Princeton subject headings:
Agriculture--Economic aspects--Developing countries--Congresses.
Economic development--Congresses.
Natural resources--Developing countries--Congresses.
Raw materials--Developing countries--Congresses.