Columbia subject headings:
Harvard subject headings:
Communism--France--History
Labor movement--France--History
Labor unions--France--Political activity--History.
Labor unions--Political activity--France--History.
Socialism--France
Socialism--France--History
Working class--France--Political activity--History.
Princeton subject headings:
Communism--France--History.
Labor unions--France--Political activity--History.
Socialism--France--History.
Working class--France--Political activity--History.