Columbia subject headings:
Print dealers--History--18th century--Congresses.
Print dealers--History--19th century--Congresses.
Prints, European--18th century--Congresses.
Prints, European--19th century--Congresses.
Harvard subject headings:
Art and industry--Europe--Congresses.
Prints, European--18th century--Congresses.
Prints, European--19th century--Congresses.
Princeton subject headings:
Print dealers--History--18th century--Congresses.
Print dealers--History--19th century--Congresses.
Prints, European--18th century--Congresses.
Prints, European--19th century--Congresses.