Columbia subject headings:
Agricultural productivity--Africa.
Agriculture--Economic aspects--Africa.
Food supply--Africa.
Harvard subject headings:
Africa--Foreign economic relations--Brazil.
Africa--Foreign economic relations--China.
Africa--Foreign economic relations--India.
Agricultural development projects--Africa.
Brazil--Foreign economic relations--Africa.
China--Foreign economic relations--Africa.
Food security--Africa.
Food supply--Africa
India--Foreign economic relations--Africa.
Princeton subject headings:
Africa--Foreign economic relations--Brazil.
Africa--Foreign economic relations--China.
Africa--Foreign economic relations--India.
Agricultural development projects--Africa.
Brazil--Foreign economic relations--Africa.
China--Foreign economic relations--Africa.
Food security--Africa.
Food supply--Africa.
India--Foreign economic relations--Africa.