Columbia subject headings:
Harvard subject headings:
Exports--Mexico
Exports--United States
Foreign trade regulation--North America.
Free trade--Environmental aspects--Mexican-American Border Region.
Free trade--North America
Imports--Mexico.
Imports--United States
Labor market--Mexico.
Labor market--United States.
Mexico--Commerce--United States.
North American Free Trade Agreement
United States--Commerce--Mexico.
Princeton subject headings:
Exports--Mexico.
Exports--United States.
Free trade--Environmental aspects--Mexican-American Border Region.
Free trade--North America.
Imports--Mexico.
Imports--United States.
Labor market--Mexico.
Labor market--United States.
Mexico--Commerce--United States.
North American Free Trade Agreement
United States--Commerce--Mexico.