Columbia subject headings:
European Union countries--Commercial policy.
European Union.
Free trade--Government policy--European Union countries.
Trade regulation--European Union countries.
World Trade Organization.
Harvard subject headings:
Commercial treaties--Interpretation and construction.
European Union
European Union countries--Commercial treaties--Interpretation and construction.
Foreign trade regulation--European Union countries.
Foreign trade regulation.
Tariff--Law and legislation--European Union countries.
Tariff--Law and legislation.
World Trade Organization
Princeton subject headings:
European Union countries--Commercial policy.
European Union.
Free trade--Government policy--European Union countries.
Trade regulation--European Union countries.
World Trade Organization.