Columbia subject headings:
Labor movement--Political activity--Italy--Tuscany--History.
Labor unions and communism--Italy--Tuscany--History.
Labor unions--Political activity--Italy--Tuscany--History.
Socialism--Italy--Tuscany--History.
Harvard subject headings:
Labor movement--Italy--Tuscany--Political activity--History.
Labor movement--Political activity--Italy--Tuscany--History.
Labor unions and communism--Italy--Tuscany--History.
Labor unions and socialism--Italy--Tuscany--History.
Labor unions--Italy--Tuscany--Political activity--History.
Labor unions--Political activity--Italy--Tuscany--History.
Socialism--Italy--Tuscany--History.
Socialism--Italy--Tuscany.
Princeton subject headings:
Labor movement--Italy--Tuscany--History.
Labor unions--Italy--Tuscany--History.
Socialism--Italy--Tuscany--History.