Columbia subject headings:
Bonn (Germany)--History--Chronology.
Germany--History--Revolution, 1848-1849--Chronology.
Harvard subject headings:
Bonn (Germany)--History--Chronology.
Germany--History--Revolution, 1848-1849--Chronology.
Princeton subject headings:
Bonn (Germany)--History.
Germany--Politics and government--1848-1870.