Columbia subject headings:
Canada--Commercial treaties.
Free trade--Canada.
Free trade--Mexico.
Free trade--United States.
Mexico--Commercial treaties.
United States--Commercial treaties.
Harvard subject headings:
Foreign trade regulation--North America.
Free trade--Canada
Free trade--Mexico
Free trade--North America
Free trade--United States
Tariff--Law and legislation--North America.
Treaties.
Princeton subject headings:
Canada, 1992 Oct. 7.. Treaties, etc.
Foreign trade regulation--North America.
Free trade--Canada.
Free trade--Mexico.
Free trade--North America.
Free trade--United States.
Tariff--Law and legislation--North America.