Columbia subject headings:
German reunification question (1949-1990)
Germany--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Germany.
Soviet Union--Foreign relations.
Harvard subject headings:
German reunification question (1949-1990)
Germany--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--1917-1945.
Soviet Union--Foreign relations--Germany.
Soviet Union--Foreign relations.
Princeton subject headings:
German reunification question (1949-1990)
Germany--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Germany.
Soviet Union--Foreign relations.