Columbia subject headings:
Harvard subject headings:
Russia--Foreign relations--1894-1917.
Soviet Union--Foreign relations--1917-1945
World War, 1914-1918--Diplomatic history
World War, 1914-1918--Russia
Princeton subject headings:
Russia--Foreign relations--1894-1917.
Soviet Union--Foreign relations--1917-.
World War, 1914-1918--Diplomatic history.
World War, 1914-1918--Russia.