Columbia subject headings:
Harvard subject headings:
Gorbachev, Mikhail Sergeevich, 1931-
Soviet Union--Economic conditions--1975-1985.
Soviet Union--Economic conditions--1985-1991.
Soviet Union--Politics and government--1985-1991.
Princeton subject headings:
Gorbachev, Mikhail Sergeevich, 1931-2022.
Soviet Union--Economic conditions--1976-.
Soviet Union--Politics and government--1982-.