Columbia subject headings:
Agriculture and state--United States.
Food industry and trade--United States.
United States--Foreign relations--1961-1963.
Harvard subject headings:
Agriculture and state--United States.
Food industry and trade--United States
United States--Foreign relations--1961-1963.
Princeton subject headings:
Agriculture and state--United States.
Food industry and trade--United States.
United States--Foreign relations--1977-1981.