Columbia subject headings:
Architecture, Modern--20th century--Congresses.
Architecture--Italy--Perugia--History--20th century--Congresses.
Nicolosi, Giuseppe, 1901-1981--Congresses.
Harvard subject headings:
Architecture, Modern--20th century--Congresses
Architecture--Italy--Perugia--History--20th century--Congresses.
Architecture--Italy--Perugia--History--Congresses.
Nicolosi, Giuseppe, 1901-1981--Congresses.
Perugia (Italy)--Buildings, structures, etc.--Congresses.
Università di Perugia--Buildings--Congresses.
Princeton subject headings:
Architecture--Italy--Perugia--History--20th century--Congresses.
Nicolosi, Giuseppe, 1901-1981--Congresses.
Perugia (Italy)--Buildings, structures, etc.--Congresses.
Università di Perugia--Buildings--Congresses.