Columbia subject headings:
Germany, Northern--History.
Germany, Northern--Social life and customs.
World War, 1914-1918--Germany, Northern.
Harvard subject headings:
Germany, Northern--History.
Germany, Northern--Social life and customs.
World War, 1914-1918--Germany, Northern.
Princeton subject headings:
Germany, Northern--History.
Germany, Northern--Social life and customs.
World War, 1914-1918--Germany, Northern.