Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--History--1945-1990
Germany (East)--Foreign relations--Soviet Union.
Germany--Politics and government--1945-1990.
Kommunisticheskai͡a partii͡a Sovetskogo Soi͡uza--History.
Soviet Union--Foreign relations--Germany (East)
Sozialistische Einheitspartei Deutschlands--History.
Princeton subject headings:
German reunification question (1949-1990)
Germany--History--1945-1990.
Germany--Politics and government--1945-1990--Historiography.