Columbia subject headings:
Drawing, Italian.
Drawing--Russia (Federation)--Saint Petersburg.
Gosudarstvennyĭ Ėrmitazh (Russia)--Catalogs.
Harvard subject headings:
Drawing, Italian--Catalogs.
Drawing--Russia (Federation)--Saint Petersburg--Catalogs.
Gosudarstvennyĭ Ėrmitazh (Russia)--Catalogs.
Princeton subject headings: