Columbia subject headings:
Czechoslovakia--History--Intervention, 1968.
Czechoslovakia--Politics and government--1945-1992.
Czechoslovakia--Social conditions.
Harvard subject headings:
Czechoslovakia--History--Intervention, 1968.
Czechoslovakia--Politics and government--1945-
Czechoslovakia--Politics and government--1945-1992.
Czechoslovakia--Social conditions.
Princeton subject headings:
Communism--Czechoslovakia.
Czechoslovakia--Politics and government--1945-1992.