Columbia subject headings:
Book industries and trade--Germany--Leipzig--History--Congresses.
Book industries and trade--Study and teaching--Germany--Leipzig--Congresses.
Kerlen, Dietrich.
Harvard subject headings:
Bibliography--Germany--Leipzig--Congresses.
Book industries and trade--Germany--Leipzig--History--Congresses.
Book industries and trade--Study and teaching--Germany--Leipzig--Congresses.
Books and reading--Germany--Leipzig--History--Congresses.
Kerlen, Dietrich.
Library science--Germany--Leipzig--History--Congresses.
Princeton subject headings: