Columbia subject headings:
Harvard subject headings:
Europe--History--1918-1945.
Europe--Politics and government--1918-1945.
World War, 1914-1918--Europe--Influence.
World War, 1914-1918--Europe.
Princeton subject headings:
Europe--History--20th century.
World War, 1914-1918--Europe--Influence.
World War, 1914-1918--Europe.