Columbia subject headings:
Architecture, Domestic--Italy--History--20th century.
Industrialized building--Italy--History--20th century.
Harvard subject headings:
Apartment houses--Italy--Palermo--History--20th century.
City planning--Italy--Palermo--History--20th century.
Industrialized building--Italy--Palermo--History--20th century.
Palermo (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Domestic--Italy--History--20th century.
Industrialized building--Italy--History--20th century.