Columbia subject headings:
Gutenberg, Johann, 1397?-1468.
Printing--History--Origin and antecedents.
Printing--Inventions.
Harvard subject headings:
Gutenberg, Johann, 1397?-1468.
Printing--History--Origin and antecedents
Printing--Inventions.
Princeton subject headings:
Gutenberg, Johann, 1397?-1468.
Printing--History--Origin and antecedents.
Printing--Inventions.