Columbia subject headings:
Agricultural systems.
Agriculture and state.
Agriculture--Economic aspects.
Agriculture--International cooperation.
Food supply.
Produce trade--Government policy.
Produce trade.
World Trade Organization.
Harvard subject headings:
Agricultural systems.
Agriculture and state.
Agriculture--Economic aspects
Agriculture--International cooperation
Food supply
Produce trade--Government policy
Produce trade.
World Trade Organization
Princeton subject headings:
Agricultural systems.
Agriculture and state.
Produce trade--Government policy.
Produce trade.
World Trade Organization.