Columbia subject headings:
Export marketing--Research--United States.
Foreign trade promotion--Research--United States.
International trade--Research--United States.
STAT-USA.
Harvard subject headings:
Export marketing--Research--United States.
Foreign trade promotion--Research--United States.
International trade--Research--United States.
STAT-USA.
Princeton subject headings:
Export marketing--Research--United States.
Foreign trade promotion--Research--United States.
International trade--Research--United States.
STAT-USA.