Columbia subject headings:
Europe, Eastern--Foreign relations--Soviet Union.
Europe, Eastern--Politics and government--1945-
Europe--Politics and government--1945-
Gorbachev, Mikhail Sergeevich, 1931-
Soviet Union--Foreign relations--Europe, Eastern.
Harvard subject headings:
Europe, Eastern--Foreign relations--Soviet Union.
Europe, Eastern--Politics and government--1945-1989.
Europe, Eastern--Politics and government--1989-
Europe--Politics and government--1945-
Gorbachev, Mikhail Sergeevich, 1931-
Soviet Union--Foreign relations--Europe, Eastern.
Princeton subject headings:
Europe, Eastern--Foreign relations--Soviet Union.
Europe, Eastern--Politics and government--1945-
Europe--Politics and government--1945-
Gorbachev, Mikhail Sergeevich, 1931-2022.
Soviet Union--Foreign relations--Europe, Eastern.