Columbia subject headings:
Elba (Italy)--Economic conditions.
Industries--Italy--Livorno (Province)--History.
Labor unions--Italy--Elba--History.
Labor unions--Italy--Livorno (Province)--History.
Livorno (Italy : Province)--Economic conditions.
Harvard subject headings:
Elba (Italy)--Economic conditions.
Industries--Italy--Livorno (Province)--History.
Labor unions--Italy--Elba--History.
Labor unions--Italy--Livorno (Province)--History.
Livorno (Italy : Province)--Economic conditions.
Princeton subject headings:
Elba--Economic conditions.
Industries--Italy--Livorno (Province)--History.
Labor unions--Italy--Elba--History.
Labor unions--Italy--Livorno (Province)--History.
Livorno (Italy : Province)--Economic conditions.