Columbia subject headings:
Perestroĭka.
Soviet Union--Economic conditions--1985-1991.
Soviet Union--Politics and government--1985-1991.
Harvard subject headings:
Labor movement--Soviet Union--History--20th century.
Soviet Union--Economic conditions--1985-1991.
Soviet Union--Politics and government--1985-1991.
Princeton subject headings:
Labor movement--Soviet Union--History--20th century.
Soviet Union--Economic conditions--1985-1991.
Soviet Union--Politics and government--1985-1991.