Columbia subject headings:
Harvard subject headings:
Foreign trade regulation--Colombia.
Foreign trade regulation--United States.
Free trade--Colombia
Free trade--United States
Tariff--Law and legislation--Colombia.
Tariff--Law and legislation--United States.
Treaties.
United States. Treaties, etc. 2006 November 22.
Princeton subject headings:
Foreign trade regulation--Colombia.
Foreign trade regulation--United States.
Free trade--Colombia.
Free trade--United States.
Tariff--Law and legislation--Colombia.
Tariff--Law and legislation--United States.