Columbia subject headings:
Drawing, Italian--Italy--Emilia-Romagna--17th century--Catalogs.
Drawing, Italian--Italy--Emilia-Romagna--18th century--Catalogs.
Drawing, Italian--Italy--Emilia-Romagna--Catalogs.
Harvard subject headings:
Artists' preparatory studies--Italy--Emilia-Romagna.
Drawing, Italian--Italy--Emilia-Romagna--17th century--Catalogs.
Drawing, Italian--Italy--Emilia-Romagna--17th century.
Drawing, Italian--Italy--Emilia-Romagna--18th century--Catalogs.
Drawing, Italian--Italy--Emilia-Romagna--18th century.
Princeton subject headings:
Artists' preparatory studies--Italy--Emilia.
Drawing, Italian--Italy--Emilia.
Drawing--17th century--Italy--Emilia.
Drawing--18th century--Italy--Emilia.