Columbia subject headings:
Harvard subject headings:
Communist countries--Foreign public opinion.
Communist countries--Politics and government.
Ideology.
Intellectuals--Attitudes--History--20th century.
Intellectuals--Europe--Political activity.
Intellectuals--Europe.
Intellectuals--Political activity--History--20th century.
Intellectuals--Travel--Communist countries.
Public opinion
Princeton subject headings:
Communist countries--Politics and government.
Ideology.
Intellectuals--Europe--Political activity.
Intellectuals--Europe.