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