Columbia subject headings:
Communism--Germany--History.
Germany (East)--Relations--Soviet Union.
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za.
Soviet Union--Relations--Germany (East)
Sozialistische Einheitspartei Deutschlands.
Harvard subject headings:
Communism--Germany--History
Germany (East)--Relations--Soviet Union.
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za.
Soviet Union--Relations--Germany (East)
Sozialistische Einheitspartei Deutschlands.
Princeton subject headings:
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za--History.
Sozialistische Einheitspartei Deutschlands--History.