Columbia subject headings:
Block books.
Illustrated books--History--15th and 16th centuries.
Printing--History--Origin and antecedents.
Watermarks.
Harvard subject headings:
Block books.
Illustrated books--History--15th and 16th centuries.
Printing--History--Origin and antecedents
Watermarks.
Princeton subject headings:
Block books.
Illustrated books--History--15th and 16th centuries.
Printing--History--Origin and antecedents.
Watermarks.