Columbia subject headings:
Piacentini, Marcello, 1881-1960--Criticism and interpretation--Congresses.
Harvard subject headings:
Architects--Italy.
Architecture--Italy--History--20th century
Architecture--Italy--Rome--History--20th century--Congresses.
Architecture--Italy--Rome--History--Congresses.
Piacentini, Marcello, 1881-1960--Congresses.
Piacentini, Marcello, 1881-1960--Criticism and interpretation--Congresses.
Rome (Italy)--Buildings, structures, etc.
Princeton subject headings:
Piacentini, Marcello, 1881-1960--Criticism and interpretation--Congresses.