Columbia subject headings:
Harvard subject headings:
Gorbachev, Mikhail Sergeevich, 1931-
Perestroĭka.
Soviet Union--Politics and government--1985-1991.
Yeltsin, Boris Nikolayevich, 1931-2007
Princeton subject headings:
Gorbachev, Mikhail Sergeevich, 1931-2022.
Soviet Union--Politics and government--1985-1991--Sources.
Yeltsin, Boris Nikolayevich, 1931-2007.