Columbia subject headings:
Confédération générale du travail--History--Congresses.
Labor unions--France--Congresses.
Working class--France--Congresses.
Harvard subject headings:
Confédération générale du travail--History--Congresses.
Labor unions--France--History--Congresses.
Working class--France--History--Congresses.
Princeton subject headings:
Labor unions--France--Congresses.
Working class--France--Congresses.