Columbia subject headings:
Harvard subject headings:
Chile--Commerce--United States--Congresses.
Free trade--Chile--Congresses.
Free trade--United States--Congresses
United States--Commerce--Chile--Congresses.
Princeton subject headings:
Chile--Commerce--United States--Congresses.
Free trade--Chile--Congresses.
Free trade--United States--Congresses.
United States--Commerce--Chile--Congresses.