Columbia subject headings:
Harvard subject headings:
International cooperation.
Perestroĭka.
Soviet Union--Foreign relations--1985-1991.
Soviet Union--Politics and government--1985-1991.
Princeton subject headings:
International cooperation.
Perestroĭka.
Soviet Union--Foreign relations--1985-1991.
Soviet Union--Politics and government--1985-1991.
World politics--1989-