Columbia subject headings:
War and civilization.
War and society.
World War, 1914-1918.
Harvard subject headings:
Europe--Civilization--20th century--Congresses.
World War, 1914-1918--Influence--Congresses.
Princeton subject headings:
Europe--Civilization--20th century--Congresses.
World War, 1914-1918--Influence--Congresses.