Columbia subject headings:
Books--History--400-1450.
Copyright.
Freedom of the press--History--To 1500.
Manuscripts.
Printers.
Harvard subject headings:
Books--History--400-1450
Copyright
Freedom of the press
Manuscripts
Printers
Princeton subject headings:
Books--History--Antiquity and middle ages.
Copyright.
Freedom of the press.
Manuscripts.
Printers.