Columbia subject headings:
Harvard subject headings:
Austria--History--1867-1918.
Europe--History--1871-1918.
World War, 1914-1918--Austria--Congresses.
World War, 1914-1918--Campaigns--Europe, Eastern--Congresses.
World War, 1914-1918--Hungary--Congresses.
World War, 1914-1918--Social aspects--Europe.
Princeton subject headings:
Austria--History--1867-1918.
Europe--History--1871-1918.
World War, 1914-1918--Social aspects--Europe.