Columbia subject headings:
Germany--History--Revolution, 1848-1849--Congresses.
Revolutions--Congresses.
Harvard subject headings:
Germany--History--Revolution, 1848-1849--Congresses.
Right and left (Political science)--History--19th century.
Princeton subject headings:
Germany--History--Revolution, 1848-1849--Congresses.
Right and left (Political science)--History--19th century.