Columbia subject headings:
Iran--Foreign relations--Soviet Union.
Iran--History--Qajar dynasty, 1794-1925.
Soviet Union--Foreign relations--Iran.
Harvard subject headings:
Iran--Foreign relations--Soviet Union.
Iran--History--Qajar dynasty, 1794-1925.
Soviet Union--Foreign relations--Iran.
Princeton subject headings:
Iran--Foreign relations--Soviet Union.
Iran--History--Qajar dynasty, 1794-1925.
Soviet Union--Foreign relations--Iran.