Columbia subject headings:
Developing countries--Commercial policy.
Developing countries.
United States--Commerce.
United States--Commercial policy.
Harvard subject headings:
Developing countries--Commerce--United States.
Developing countries--Commercial policy.
International economic relations.
United States--Commerce--Developing countries.
United States--Commerce.
United States--Commercial policy.
Princeton subject headings:
Developing countries--Commerce--United States.
Developing countries--Commercial policy.
United States--Commerce--Developing countries.
United States--Commercial policy.