Columbia subject headings:
China--Foreign relations--1644-1912--Treaties.
China--Foreign relations--1644-1912.
China--History--19th century.
Unequal treaties--History--19th century.
Harvard subject headings:
China--Foreign relations--1644-1912
China--Foreign relations--1644-1912--Treaties.
China--History--19th century
Unequal treaties--History--19th century.
Princeton subject headings: