Columbia subject headings:
Art, European--Exhibitions.
Art--Forgeries--Exhibitions.
Guercino, 1591-1666--Exhibitions.
Harvard subject headings:
Art, European--Exhibitions
Art--Forgeries--Exhibitions.
Guercino, 1591-1666--Exhibitions.
Princeton subject headings:
Art, European--Exhibitions.
Art--Forgeries--Exhibitions.
Guercino, 1591-1666--Exhibitions.