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