Columbia subject headings:
Czechoslovakia--History--1938-1945.
Czechoslovakia--History--1945-1992.
Czechoslovakia--History--Intervention, 1968.
Socialism--Czechoslovakia.
Harvard subject headings:
Czechoslovakia--History--1938-1945.
Czechoslovakia--History--1945-1992.
Czechoslovakia--History--Intervention, 1968.
Princeton subject headings:
Czechoslovakia--Politics and government--1938-1945.
Czechoslovakia--Politics and government--1945-1992.
Socialism--Czechoslovakia--History--20th century.