Columbia subject headings:
Communism--Soviet Union.
Gorbachev, Mikhail Sergeevich, 1931-
Perestroĭka.
Soviet Union--Foreign relations--1985-1991.
Harvard subject headings:
Communism--Soviet Union
Gorbachev, Mikhail Sergeevich, 1931-
Perestroĭka.
Soviet Union--Foreign relations--1985-1991.
Princeton subject headings:
Communism--Soviet Union.
Gorbachev, Mikhail Sergeevich, 1931-2022.
Perestroĭka.
Soviet Union--Foreign relations--1985-1991.