Columbia subject headings:
Harvard subject headings:
Engraving, Baroque--Italy.
Engraving, Italian--17th century--Catalogs.
Engraving, Italian.
Guercino, 1591-1666--Catalogs.
Guercino, 1591-1666--Influence.
Guercino, 1591-1666.
Princeton subject headings:
Engravers--Italy.
Guercino, 1591-1666.