Columbia subject headings:
China--Commerce--United States--Directories.
Export marketing--China--Directories.
Export marketing--United States--Directories.
Service industries--China--Directories.
Service industries--United States--Directories.
United States--Commerce--China--Directories.
Harvard subject headings:
China--Commerce--United States--Directories.
Export marketing--China--Directories.
Export marketing--United States--Directories.
Service industries--China--Directories.
Service industries--United States--Directories.
United States--Commerce--China--Directories.
Princeton subject headings: