Columbia subject headings:
Afghanistan--Foreign relations--Soviet Union.
Iran--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Afghanistan.
Soviet Union--Foreign relations--Iran.
Soviet Union--Foreign relations--Turkey.
Turkey--Foreign relations--Soviet Union.
Harvard subject headings:
Afghanistan--Foreign relations--Soviet Union.
Iran--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Afghanistan.
Soviet Union--Foreign relations--Iran.
Soviet Union--Foreign relations--Turkey.
Turkey--Foreign relations--Soviet Union.
Princeton subject headings:
Afghanistan--Foreign relations--Soviet Union.
Iran--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Afghanistan.
Soviet Union--Foreign relations--Iran.
Soviet Union--Foreign relations--Turkey.
Turkey--Foreign relations--Soviet Union.