Columbia subject headings:
Harvard subject headings:
Archives--China
Beijing (China)--Buildings, structures, etc.
China--History--Qing dynasty, 1644-1912--Sources.
Forbidden City (Beijing, China)
Princeton subject headings:
Archives--China.
Beijing (China)--Buildings, structures, etc.
China--History--Qing dynasty, 1644-1912--Sources.
Forbidden City (Beijing, China)