Columbia subject headings:
Harvard subject headings:
Blum, Robert, 1807-1848--Congresses.
Germany--History--Revolution, 1848-1849--Congresses.
Politicians--Germany--Biography--Congresses.
Revolutionaries--Germany--Biography--Congresses.
Princeton subject headings:
Blum, Robert, 1807-1848--Congresses.
Germany--History--Revolution, 1848-1849--Congresses.
Politicians--Germany--Biography--Congresses.
Revolutionaries--Germany--Biography--Congresses.