Columbia subject headings:
Great Britain--Foreign relations--Iran.
Iran--Foreign relations--Great Britain.
Iran--Foreign relations--Soviet Union.
Iran--History--20th century.
Soviet Union--Foreign relations--Iran.
Harvard subject headings:
Great Britain--Foreign relations--Iran.
Iran--Foreign relations--Great Britain.
Iran--Foreign relations--Soviet Union.
Iran--History--1909-
Soviet Union--Foreign relations--Iran.
Princeton subject headings:
Great Britain--Foreign relations--Iran.
Iran--Foreign relations--Great Britain.
Iran--Foreign relations--Soviet Union.
Iran--History--20th century.
Soviet Union--Foreign relations--Iran.