Columbia subject headings:
Perrotta, Gennaro, 1900-1962.
Harvard subject headings:
Classical philology--Congresses.
Perrotta, Gennaro, 1900-1962--Congresses.
Perrotta, Gennaro, 1900-1962.
Princeton subject headings:
Classical philology--Congresses.
Perrotta, Gennaro, 1900-1962--Congresses.