Columbia subject headings:
Harvard subject headings:
Books and reading--Germany--History--19th century--Congresses.
Fürstliche Bibliothek Corvey--Congresses.
Private libraries--Germany--Congresses.
Princeton subject headings:
Books and reading--Germany--History--19th century--Congresses.
Fürstliche Bibliothek Corvey--Congresses.
Private libraries--Germany--Congresses.