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