Columbia subject headings:
Harvard subject headings:
Democracy--Europe--History--20th century.
Europe--Politics and government--20th century
Germany--Politics and government--20th century
Monarchy--Europe--History.
Republics--History--20th century.
World War, 1914-1918--Influence
Princeton subject headings:
Democracy--Europe--History--20th century.
Europe--Politics and government--History--20th century.
Germany--Politics and government--History--20th century.
Monarchy--Europe--History.
Republics--History--20th century.
World War, 1914-1918--Influence.