Columbia subject headings:
Great Britain--Commerce--United States.
United States--Commerce--Great Britain.
United States--Commerce--West Indies.
West Indies--Commerce--United States.
Harvard subject headings:
Great Britain--Commerce--United States.
United States--Commerce--Great Britain.
United States--Commerce--West Indies.
West Indies--Commerce--United States.
Princeton subject headings:
Great Britain--Commerce--United States.
United States--Commerce--Great Britain.
United States--Commerce--West Indies.
West Indies--Commerce--United States.