Columbia subject headings:
Gutenberg, Johann, 1397?-1468--Anniversaries, etc.--Congresses.
Gutenberg, Johann, 1397?-1468--Influence--Congresses.
Printers--Germany--Congresses.
Printing--History--Origin and antecedents--Congresses.
Harvard subject headings:
Gutenberg, Johann, 1397?-1468--Anniversaries, etc.--Congresses.
Gutenberg, Johann, 1397?-1468--Influence--Congresses.
Printers--Germany--Congresses.
Printing--History--Origin and antecedents--Congresses.
Princeton subject headings:
Gutenberg, Johann, 1397?-1468--Anniversaries, etc.--Congresses.
Gutenberg, Johann, 1397?-1468--Influence--Congresses.
Printers--Germany--Congresses.
Printing--History--Origin and antecedents--Congresses.