Columbia subject headings:
Free trade--North America.
North America--Economic conditions--21st century.
North America--Economic integration.
North American Free Trade Agreement
Harvard subject headings:
Free trade--North America
Free trade--North America--Congresses
Free trade--Social aspects--North America--Congresses.
North America--Economic conditions--21st century.
North America--Economic integration
North America--Economic integration--Congresses.
North America--Economic integration--Social aspects--Congresses.
North American Free Trade Agreement
Princeton subject headings:
Free trade--North America.
North America--Economic conditions--21st century.
North America--Economic integration.
North American Free Trade Agreement