Columbia subject headings:
Agriculture--Economic aspects--United States.
Food industry and trade--United States.
Food supply--United States.
Produce trade--United States.
Harvard subject headings:
Agriculture--Economic aspects--United States
Food industry and trade--United States
Food supply--United States
Produce trade--United States
Princeton subject headings:
Agriculture--Economic aspects--United States.
Food industry and trade--United States.
Food supply--United States.
Produce trade--United States.