Columbia subject headings:
Agriculture and state--European Economic Community countries.
Agriculture and state--United States.
European Economic Community countries--Foreign economic relations--United States.
United States--Foreign economic relations--European Economic Community countries.
Harvard subject headings:
Agriculture and state--European Economic Community countries.
Agriculture and state--United States.
European Economic Community countries--Foreign economic relations--United States.
United States--Foreign economic relations--European Economic Community countries.
Princeton subject headings:
Agriculture and state--European Economic Community countries.
Agriculture and state--United States.
European Economic Community countries--Foreign economic relations--United States.
United States--Foreign economic relations--European Economic Community countries.