Columbia subject headings:
Harvard subject headings:
Business enterprises--Italy--History--Bibliography.
Industries--Italy--History--Bibliography.
Industries--Italy--Lombardy--History--Bibliography.
Labor--Italy--History--Bibliography.
Labor--Italy--Lombardy--History--Bibliography.
Press, Labor--Italy--History--Bibliography.
Press, Labor--Italy--Lombardy--History--Bibliography.
Princeton subject headings:
Industries--Italy--History--Bibliography.
Industries--Italy--Lombardy--History--Bibliography.
Labor--Italy--History--Bibliography.
Labor--Italy--Lombardy--History--Bibliography.
Press, Labor--Italy--History--Bibliography.
Press, Labor--Italy--Lombardy--History--Bibliography.