Columbia subject headings:
Heads of state--Soviet Union--Succession.
Heads of state--Succession--Soviet Union.
Soviet Union--Politics and government--1953-1985.
Soviet Union--Politics and government--1985-1991.
Harvard subject headings:
Heads of state--Soviet Union--Succession.
Heads of state--Succession--Soviet Union.
Soviet Union--Politics and government--1953-1985.
Soviet Union--Politics and government--1985-1991.
Princeton subject headings:
Heads of state--Soviet Union--Succession.
Soviet Union--Politics and government--1953-1985.
Soviet Union--Politics and government--1982-.