Columbia subject headings:
Architecture, Domestic--Italy--Lombardy--Congresses.
Lombardy (Italy)--Buildings, structures, etc.--Congresses.
Lombardy (Italy)--Buildings, structures, etc.--Exhibitions.
Public housing--Italy--Lombardy--Congresses.
Public housing--Italy--Lombardy--Exhibitions.
Harvard subject headings:
Apartment houses--Italy--Lombardy--History--20th century.
Architecture, Domestic--Italy--Lombardy--History--20th century.
Working class--Dwellings--Italy--Lombardy--History--20th century.
Princeton subject headings:
Apartment houses--Italy--Lombardy--Exhibitions.