Columbia subject headings:
Czechoslovakia--Foreign relations--Soviet Union.
Czechoslovakia--Politics and government--1945-1992.
Soviet Union--Foreign relations--Czechoslovakia.
Harvard subject headings:
Czechoslovakia--Foreign relations--Soviet Union
Czechoslovakia--Politics and government--1945-
Soviet Union--Foreign relations--Czechoslovakia
Princeton subject headings:
Czechoslovakia--History--1945-1992.
Czechoslovakia--History--Coup d'état, 1948.
Czechoslovakia--History--Intervention, 1968.