Columbia subject headings:
Agriculture and state--Mexico.
Food supply--Government policy--Mexico.
Nutrition policy--Mexico.
Produce trade--Mexico.
Produce trade--United States.
Sistema Alimentario Mexicano.
Harvard subject headings:
Agriculture and state--Mexico.
Food supply--Government policy--Mexico
Mexico--Commerce--United States.
United States--Commerce--Mexico.
Princeton subject headings:
Agriculture and state--Mexico.
Food supply--Government policy--Mexico.
Mexico--Commerce--United States.
United States--Commerce--Mexico.