Columbia subject headings:
Germany (West)--Foreign relations--Soviet Union--Sources.
Soviet Union--Foreign relations--Germany (West)--Sources.
Harvard subject headings:
Germany (West)--Foreign relations--Soviet Union--Sources.
Soviet Union--Foreign relations--Germany (West)--Sources.
Princeton subject headings:
Germany (West)--Foreign relations--Soviet Union--Sources.
Soviet Union--Foreign relations--Germany (West)--Sources.