Columbia subject headings:
Penna, Sandro--Exhibitions.
Harvard subject headings:
Authors, Italian--20th century--Biography--Exhibitions.
Penna, Sandro--Exhibitions--Catalogs.
Penna, Sandro--Exhibitions.
Penna, Sandro--Homes and haunts--Italy--Rome--Exhibitions.
Rome (Italy)--Intellectual life--20th century--Exhibitions.
Princeton subject headings:
Authors, Italian--20th century--Biography--Exhibitions.
Penna, Sandro--Pictorial works--Exhibitions.