Columbia subject headings:
Czechoslovakia--History--1938-1945.
Czechoslovakia--History--1945-1992.
Czechoslovakia--Politics and government--1938-1945.
Czechoslovakia--Politics and government--1945-1992.
Harvard subject headings:
Czechoslovakia--History--Intervention, 1968.
Czechoslovakia--History.
Czechoslovakia--Politics and government--1968-1989.
Czechoslovakia--Politics and government--1989-
Princeton subject headings:
Czechoslovakia--History--1938-1945.
Czechoslovakia--History--1945-1992.
Czechoslovakia--Politics and government--1938-1945.
Czechoslovakia--Politics and government--1945-1992.