Columbia subject headings:
Berlin Wall, Berlin, Germany, 1961-1989--Sources.
Germany (East)--Foreign relations--Soviet Union--Sources.
Maksimychev, I. F. (Igorʹ Fedorovich)--Diaries.
Soviet Union--Foreign relations--Germany (East)--Sources.
Harvard subject headings:
Berlin Wall, Berlin, Germany, 1961-1989
Berlin Wall, Berlin, Germany, 1961-1989--Sources.
Germany (East)--Foreign relations--Soviet Union--Sources.
Maksimychev, I. F. (Igorʹ Fedorovich)--Diaries.
Soviet Union--Foreign relations--Germany (East)--Sources.
Princeton subject headings: