Columbia subject headings:
Harvard subject headings:
Communism--Czechoslovakia
Communism--Czechoslovakia--History
Czechoslovakia--History--1945-1992.
Czechoslovakia--Politics and government--1945-1992.
Czechoslovakia--Politics and government.
Political persecution--Czechoslovakia--History.
Secret service--Czechoslovakia--History.
Princeton subject headings:
Communism--Czechoslovakia.
Czechoslovakia--History--1945-1992.
Czechoslovakia--Politics and government--1945-1992.
Political persecution--Czechoslovakia--History,.
Secret service--Czechoslovakia--History.