Columbia subject headings:
Germany--History--Revolution, 1848-1849.
Germany--Politics and government--1789-1900.
Germany--Politics and government--20th century.
Harvard subject headings:
Germany--Historiography.
Germany--History--Revolution, 1848-1849.
Germany--Politics and government--1789-1900
Germany--Politics and government--20th century
Princeton subject headings:
Germany--Historiography.
Germany--Politics and government--1789-1900.
Germany--Politics and government--20th century.