Columbia subject headings:
Harvard subject headings:
Confederazione generale del lavoro (Italy)--History.
Labor unions--Italy--Officials and employees--Biography.
Rigola, Rinaldo, 1864-1954.
Princeton subject headings:
Confederazione generale del lavoro (Italy)--History.
Labor unions--Italy--Officials and employees--Biography.
Rigola, Rinaldo, 1864-1954.