Columbia subject headings:
World War, 1914-1918--Armistices.
World War, 1914-1918--Blockades.
World War, 1914-1918--Food supply--Germany.
Harvard subject headings:
World War, 1914-1918--Armistices
World War, 1914-1918--Blockades
World War, 1914-1918--Food supply--Germany
Princeton subject headings:
World War, 1914-1918--Armistices.
World War, 1914-1918--Blockades.
World War, 1914-1918--Food supply--Germany.