Columbia subject headings:
Book collectors--Europe--History.
Early printed books--16th century.
Incunabula.
Libraries--Italy--History.
Printing--Europe--History.
Harvard subject headings:
Book collecting--Europe--History.
Book collectors--Europe.
Printing--Europe--History
Princeton subject headings:
Book collectors--Europe--History.
Early printed books--16th century.
Incunabula.
Printing--Europe--History.