Columbia subject headings:
Agriculture--Developing countries.
Developing countries--Agriculture.
Developing countries--Food supply.
Food supply--Developing countries.
Food supply.
Harvard subject headings:
Agriculture--Developing countries
Developing countries--Agriculture.
Developing countries--Food supply.
Food supply
Food supply--Developing countries
Princeton subject headings:
Agriculture--Developing countries.
Food supply--Developing countries.
Food supply.