Columbia subject headings:
Harvard subject headings:
World War, 1914-1918--Diplomatic history--Sources.
World War, 1914-1918--Russia--Sources.
Princeton subject headings:
Russia--History--Nicholas II, 1894-1917.
World War, 1914-1918--Diplomatic history--Sources.
World War, 1914-1918--Diplomatic history.
World War, 1914-1918--Russia--Sources.
World War, 1914-1918--Russia.