Columbia subject headings:
Architects--Italy--Congresses.
Architecture--Italy--History--20th century--Congresses.
Harvard subject headings:
Architects--Italy--Congresses.
Architecture, Italian--Designs and plans--Congresses.
Architecture, Modern--20th century--Italy--Congresses.
Architecture--Italy--Designs and plans--Congresses.
Architecture--Italy--History--20th century--Congresses
Princeton subject headings: