Columbia subject headings:
History, Modern--1945-1989.
Sager, Peter, 1925-2006.
Soviet Union--Politics and government--1945-1991.
Soviet Union--Study and teaching (Higher)--Switzerland.
Harvard subject headings:
Civil rights and socialism.
Communism and liberty--Europe, Eastern.
Europe, Eastern--Politics and government--20th century.
Sager, Peter, 1925-
Sager, Peter, 1925-2006.
Princeton subject headings:
History, Modern--1945-1989.
Sager, Peter, 1925-2006.
Soviet Union--Politics and government--1945-1991.
Soviet Union--Study and teaching (Higher)--Switzerland.