Columbia subject headings:
Gutenberg, Johann, 1397?-1468.
Incunabula.
Printing--Germany--Mainz (Rhineland-Palatinate)--History--Origin and antecedents.
Printing--History--Origin and antecedents.
Harvard subject headings:
Gutenberg, Johann, 1397?-1468.
Incunabula.
Printing--Germany (West)--Mainz--History--Origin and antecedents.
Printing--History--Origin and antecedents
Princeton subject headings:
Gutenberg, Johann, 1397?-1468.
Printing--History--Origin and antecedents.