Columbia subject headings:
Harvard subject headings:
Gorbachev, Mikhail Sergeevich, 1931-
Russia (Federation)--Politics and government--1991-
Soviet Union--Politics and government--1985-1991.
Princeton subject headings:
Gorbachev, Mikhail Sergeevich, 1931-2022.
Russia (Federation)--Politics and government--1991-
Soviet Union--Politics and government--1985-1991.