Columbia subject headings:
Bibliography--Italy--History and criticism.
Bibliography--Spain--History and criticism.
Harvard subject headings:
Bibliography--Italy--History.
Bibliography--Spain--History.
Early printed books--Italy.
Early printed books--Spain.
Italy--Imprints.
Spain--Imprints
Princeton subject headings:
Bibliography--Italy--Early printed books--History.
Bibliography--Spain--Early printed books--History.
Printing--Italy--History.
Printing--Spain--History.