Columbia subject headings:
Canada--Foreign economic relations--United States--Congresses.
Free trade--North America.
North America--Economic integration--Congresses.
North American Free Trade Agreement
United States--Foreign economic relations--Canada--Congresses.
Harvard subject headings:
Canada--Foreign economic relations--United States--Congresses.
Canada. Treaties, etc. 1992 October 7.
Free trade--North America
North America--Economic integration--Congresses.
North America--Economic integration.
North American Free Trade Agreement
United States--Foreign economic relations--Canada--Congresses.
Princeton subject headings: