Columbia subject headings:
Europe--Foreign relations--Great Britain--Congresses.
Germany--Congresses.
Great Britain--Foreign relations--Europe--Congresses.
Russia--Congresses.
Harvard subject headings:
Europe--Foreign relations--Great Britain--Congresses.
Germany--Congresses.
Great Britain--Foreign relations--Europe--Congresses.
Russia--Congresses.
Princeton subject headings:
Germany--Foreign relations--Great Britain.
Great Britain--Foreign relations--Germany.
Great Britain--Foreign relations--Russia.
Russia--Foreign relations--Great Britain.