Columbia subject headings:
Drawing, Italian--Italy--Valsesia--Catalogs.
Drawing--Italy--Varallo--Catalogs.
Pinacoteca di Varallo--Catalogs.
Harvard subject headings:
Drawing, Italian--Italy--Piedmont--Catalogs.
Drawing, Italian--Italy--Sesia River Valley--Catalogs.
Drawing--Italy--Varallo--Catalogs.
Pinacoteca di Varallo--Catalogs.
Princeton subject headings:
Catalogs.
Drawing, Italian--Italy--Valsesia--Catalogs.
Drawing--Italy--Varallo--Catalogs.
Pinacoteca di Varallo--Catalogs.