Columbia subject headings:
Foreign trade regulation--European Economic Community countries.
Foreign trade regulation--United States.
Foreign trade regulation.
Tariff--Law and legislation--European Economic Community countries.
Tariff--Law and legislation--United States.
Tariff--Law and legislation.
Harvard subject headings:
Foreign trade regulation--European Economic Community countries
Foreign trade regulation--United States.
Foreign trade regulation.
General Agreement on Tariffs and Trade (Organization)
Tariff--Law and legislation--European Economic Community countries.
Tariff--Law and legislation--United States.
Tariff--Law and legislation.
United States--Foreign economic relations.
Princeton subject headings:
Foreign trade regulation--European Economic Community countries.
Foreign trade regulation--United States.
Foreign trade regulation.
Tariff--Law and legislation--European Economic Community countries.
Tariff--Law and legislation--United States.
Tariff--Law and legislation.