Columbia subject headings:
Harvard subject headings:
Europe--Civilization--20th century.
Europe--Intellectual life--20th century.
War and civilization--Europe.
World War, 1914-1918--Europe.
World War, 1914-1918--Social aspects--Europe.
World War, 1914-1918--Social aspects.
Princeton subject headings:
Europe--Civilization--20th century.
World War, 1914-1918--Social aspects.