Columbia subject headings:
Berlin Wall, Berlin, Germany, 1961-1989--History--Congresses.
Communism--Europe, Eastern--History--20th century--Congresses.
Germany (East)--Politics and government--Congresses.
Sozialistische Einheitspartei Deutschlands--History--Congresses.
Harvard subject headings:
Berlin Wall, Berlin, Germany, 1961-1989--History--Congresses.
Communism--Europe, Eastern--History--20th century--Congresses.
Germany (East)--Politics and government--Congresses.
Sozialistische Einheitspartei Deutschlands--History--Congresses.
Princeton subject headings:
Berlin Wall, Berlin, Germany, 1961-1989--History--Congresses.
Communism--Europe, Eastern--History--20th century--Congresses.
Germany (East)--Politics and government--Congresses.
Sozialistische Einheitspartei Deutschlands--History--Congresses.