Columbia subject headings:
Harvard subject headings:
History, Modern--20th century--Congresses.
War and civilization--Congresses.
World War, 1914-1918--Congresses
World War, 1914-1918--Historiography--Congresses.
Princeton subject headings:
History, Modern--20th century--Congresses.
War and civilization--Congresses.
World War, 1914-1918--Congresses.
World War, 1914-1918--Historiography--Congresses.