Columbia subject headings:
Drawing--Catalogs.
Drawing--Private collections--Italy--Catalogs.
Sforni, Guido--Art collections--Catalogs.
Harvard subject headings:
Drawing, European--20th century--Catalogs.
Drawing--Collectors and collecting--Italy--Catalogs.
Drawing--Private collections--Italy--Catalogs.
Sforni, Guido, 1935-1975--Art collections--Catalogs.
Princeton subject headings:
Catalogs.
Drawing--Catalogs.
Drawing--Private collections--Italy--Catalogs.
Sforni, Guido--Art collections--Catalogs.