Columbia subject headings:
Harvard subject headings:
Cocoa
Food industry and trade--Developing countries
Protectionism.
Soybean.
Tariff on chocolate.
Tariff on farm produce.
Princeton subject headings:
Balance of trade--Developing countries.
Cocoa.
Produce trade--Developing countries.
Produce trade--Government policy.
Protectionism--Case studies.
Tariff on chocolate.
Tariff on farm produce.