Columbia subject headings:
Communism--Great Britain--History.
Communism--Soviet Union--History.
Great Britain--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Great Britain.
Working class--Political activity--Great Britain--History.
Harvard subject headings:
Communism--Great Britain--History.
Communism--Soviet Union--History
Great Britain--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Great Britain.
Working class--Great Britain--Political activity--History.
Princeton subject headings:
Communism--Great Britain--History.
Communism--Soviet Union--History.
Great Britain--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Great Britain.
Working class--Great Britain--Political activity--History.