Columbia subject headings:
Harvard subject headings:
Perestroĭka
Ryzhkov, N. I. (Nikolaĭ Ivanovich)
Soviet Union--Politics and government--1953-1985.
Soviet Union--Politics and government--1985-1991.
Princeton subject headings:
Perestroĭka.
Ryzhkov, N. I. (Nikolaĭ Ivanovich)
Soviet Union--Politics and government--1953-1985.
Soviet Union--Politics and government--1985-1991.