Columbia subject headings:
Harvard subject headings:
Bricklayers--Italy--Lecco (Province)--Social conditions--20th century.
Bricklayers--Italy--San Martino Valley--Social conditions--20th century.
Bricklayers--Labor unions--Italy--San Martino Valley--History.
Lecco (Italy : Province)--Social conditions--20th century.
San Martino Valley (Italy)--Social conditions.
Princeton subject headings:
Bricklayers--Italy--Lecco (Province)--Social conditions--20th century.
Bricklayers--Italy--San Martino Valley--Social conditions--20th century.
Bricklayers--Labor unions--Italy--San Martino Valley--History.
Lecco (Italy : Province)--Social conditions--20th century.
San Martino Valley (Italy)--Social conditions.