Columbia subject headings:
Communism--Europe.
Gorbachev, Mikhail Sergeevich, 1931-2022.
Internationalism.
Perestroĭka.
Socialism--Europe.
Soviet Union--Politics and government--1985-1991.
Harvard subject headings:
Communism--Europe
Gorbachev, Mikhail Sergeevich, 1931-
Internationalism.
Perestroĭka.
Socialism--Europe
Soviet Union--Politics and government--1985-1991.
Princeton subject headings:
Communism--Europe.
Gorbachev, Mikhail Sergeevich, 1931-2022.
Internationalism.
Perestroĭka.
Socialism--Europe.
Soviet Union--Politics and government--1985-1991.