Columbia subject headings:
China--Foreign relations--Congresses.
China--Relations--Europe--Congresses.
Europe--Relations--China--Congresses.
Harvard subject headings:
China--Foreign relations--To 1912--Congresses.
China--Relations--Europe--Congresses.
Europe--Relations--China--Congresses.
Princeton subject headings:
China--Foreign relations--To 1912--Congresses.
China--Relations--Europe.
Europe--Relations--China.