Columbia subject headings:
Harvard subject headings:
Czechoslovakia--History--Intervention, 1968--Congresses.
Czechoslovakia--History--Intervention, 1968--Public opinion--Congresses.
Public opinion--Italy--History--20th century--Congresses.
Princeton subject headings:
Czechoslovakia--History--Intervention, 1968--Congresses.
Czechoslovakia--History--Intervention, 1968--Public opinion--Congresses.
Public opinion--Italy--History--20th century--Congresses.