Columbia subject headings:
Harvard subject headings:
Camera del lavoro di Milano. Ufficio studi di economia.--History.
Labor--Italy--Milan.
Milan (Italy)--Economic conditions.
Princeton subject headings:
Camera del lavoro di Milano. Ufficio studi di economia--History.
Labor movement--Italy--Milan--History--20th century.
Labor unions and communism--Italy--Milan--History--20th century.
Milan (Italy)--Economic conditions--20th century.
Milan (Italy)--Social conditions--20th century.