Columbia subject headings:
Bulla family--Exhibitions.
Lithography, Italian--19th century--Exhibitions.
Lithography, Italian--20th century--Exhibitions.
Harvard subject headings:
Bulla (Firm)--Exhibitions.
Printers--France--Paris--Exhibitions.
Printers--Italy--Rome--Exhibitions.
Prints--19th century--Exhibitions
Prints--20th century--Exhibitions
Publishers and publishing--France--Paris--History--19th century--Exhibitions.
Publishers and publishing--Italy--Rome--History--20th century--Exhibitions.
Princeton subject headings:
Bulla (Firm)--Exhibitions--2001--Rome (Italy)
Lithography, Italian--19th century--Exhibitions.
Lithography, Italian--20th century--Exhibitions.