Columbia subject headings:
Printing--England--History.
Printing--Specimens.
Harvard subject headings:
Incunabula--England.
Printers--England--History--15th century.
Printing--England--History--15th century.
Type and type-founding--England--History--15th century.
Princeton subject headings:
Incunabula--England.
Printers--England--History--15th century.
Printing--England--History--15th century.
Type and type-founding--England--History--15th century.