Columbia subject headings:
Art, Italian--20th century.
Art--Collectors and collecting--Italy--History--20th century.
Art--Private collections--Italy.
Della Ragione, Alberto--Art collections.
Della Ragione, Alberto--Art patronage.
Harvard subject headings:
Art, Italian--20th century
Art--Collectors and collecting--Italy--History--20th century.
Della Ragione, Alberto--Art collections.
Della Ragione, Alberto--Art patronage.
Princeton subject headings:
Art, Italian--20th century.
Art--Collectors and collecting--Italy--History--20th century.
Art--Private collections--Italy.
Della Ragione, Alberto--Art collections.
Della Ragione, Alberto--Art patronage.