Columbia subject headings:
Agriculture--Economic aspects--United States.
Competition, Unfair--United States.
Food industry and trade--United States.
Grain trade--United States.
Grocery trade--United States.
Packing-houses--United States.
Harvard subject headings:
Agriculture--Economic aspects--United States
Competition, Unfair--United States
Food industry and trade--United States
Grain trade--United States.
Grocery trade--United States
Packing-houses--United States.
Princeton subject headings:
Agriculture--Economic aspects--United States.
Competition, Unfair--United States.
Food industry and trade--United States.
Grain trade--United States.
Grocery trade--United States.
Packing-houses--United States.