Columbia subject headings:
Harvard subject headings:
Heads of state--Succession.
Leadership.
Policy sciences.
Soviet Union--Politics and government--1945-1991.
United States--Politics and government--1945-1989.
Princeton subject headings:
Heads of state--Succession.
Leadership.
Policy sciences.
Soviet Union--Politics and government--1945-1991.
United States--Politics and government--1945-1989.