Columbia subject headings:
Digital libraries--Germany--History--Congresses.
Information science--Technological innovations--Germany--History--Congresses.
Libraries--Germany--History--Congresses.
Library materials--Digitization--Congresses.
Library science--Germany--History--Congresses.
Harvard subject headings:
Digital libraries--Germany--History--Congresses.
Information science--Technological innovations--Germany--History--Congresses.
Libraries--Germany--History--Congresses.
Library materials--Digitization--Congresses.
Library science--Germany--History--Congresses.
Princeton subject headings: