Columbia subject headings:
Harvard subject headings:
Buy national policy--China--History--20th century.
China--Commerce--History--20th century.
China--Economic conditions--1912-1949.
Commercial products--China--History--20th century.
Princeton subject headings:
Buy national policy--China--History--20th century.
China--Commerce--History--20th century.
Commercial products--China--History--20th century.