Columbia subject headings:
Harvard subject headings:
Early printed books--Portugal--16th century--Bibliography.
Early printed books--Spain--16th century--Bibliography.
Portugal--Imprints.
Printing--Portugal--History--16th century.
Printing--Portugal--History.
Printing--Spain--History
Printing--Spain--History--16th century.
Spain--Imprints
Princeton subject headings:
Printing--Portugal--History.
Printing--Spain--History.