Columbia subject headings:
Harvard subject headings:
Deutsche Bücherei (Germany)--History.
Government libraries--Germany--History.
Libraries--Germany--Leipzig--History--20th century.
National libraries--Germany--History.
Princeton subject headings:
Deutsche Bibliothek (Frankfurt am Main, Germany)--History.
Deutsche Bücherei (Germany)--History.
Libraries and state--Germany (East)--History--20th century.
National libraries--Germany--Leipzig--History--20th century.