Columbia subject headings:
Communism--France.
Communism--Italy.
Labor unions--Political activity--France.
Labor unions--Political activity--Italy.
Parti communiste français.
Partito comunista italiano.
Harvard subject headings:
Communism--France
Communism--Italy
Labor unions--France--Political activity.
Labor unions--Political activity--France.
Labor unions--Political activity--Italy
Parti communiste français
Partito comunista italiano
Princeton subject headings: