Columbia subject headings:
Europe, Central--History.
Europe, Eastern--History.
World War, 1914-1918--Europe, Central.
World War, 1914-1918--Europe, Eastern.
Harvard subject headings:
Europe, Central--History.
Europe, Eastern--History.
World War, 1914-1918--Europe, Central.
World War, 1914-1918--Europe, Eastern.
Princeton subject headings:
Europe, Central--History.
Europe, Eastern--History.
Military art and science--Europe, Eastern--History--20th century.