Columbia subject headings:
Casebooks (Law)
Foreign trade regulation--Cases.
Foreign trade regulation--United States--Cases.
International economic relations.
Tariff--Law and legislation--Cases.
Tariff--Law and legislation--United States--Cases.
Harvard subject headings:
Foreign trade regulation--Cases.
Foreign trade regulation--United States--Cases.
Foreign trade regulation--United States.
Foreign trade regulation.
International business enterprises--Law and legislation--Cases.
International business enterprises--Law and legislation--United States--Cases.
International economic relations.
Tariff--Law and legislation--United States--Cases.
Tariff--Law and legislation--United States.
Tariff--Law and legislation.
Princeton subject headings:
Foreign trade regulation--United States.
Foreign trade regulation.
International economic relations.
Tariff--Law and legislation--United States.
Tariff--Law and legislation.