Columbia subject headings:
Harvard subject headings:
Liberalism--Germany--History--19th century--Congresses.
Political science--Germany--History--19th century--Congresses.
Rotteck, Carl von, 1775-1840--Congresses.
Welcker, Karl Theodor, 1790-1869--Congresses.
Princeton subject headings:
Liberalism--Germany--History--19th century--Congresses.
Political science--Germany--History--19th century--Congresses.
Rotteck, Carl von, 1775-1840--Congresses.
Welcker, Karl Theodor, 1790-1869--Congresses.