Columbia subject headings:
Europe, Eastern--History--1945-1989.
Europe, Eastern--History--1989-
Europe, Eastern--Politics and government--1945-1989.
Europe, Eastern--Politics and government--1989-
Revolutions--Europe, Eastern.
Soviet Union--Politics and government--1985-1991.
Harvard subject headings:
Europe, Eastern--History--1945-1989.
Europe, Eastern--History--1989-
Europe, Eastern--Politics and government--1945-1989.
Europe, Eastern--Politics and government--1989-
Revolutions--Europe, Eastern.
Soviet Union--Politics and government--1985-1991.
Princeton subject headings: