Columbia subject headings:
United States--Commerce.
United States--Commercial policy.
United States--Economic policy--2001-2009.
United States--Foreign economic relations.
Harvard subject headings:
United States--Commerce.
United States--Commercial policy.
United States--Economic policy--2001-2009.
United States--Foreign economic relations.
Princeton subject headings:
United States--Commerce.
United States--Commercial policy.
United States--Economic policy--2001-2009.
United States--Foreign economic relations.