Columbia subject headings:
Soviet Union--Administrative and political divisions.
Soviet Union--History--Revolution, 1917-1921.
Soviets (Councils)
Harvard subject headings:
Soviet Union--Administrative and political divisions.
Soviet Union--History--Revolution, 1917-1921.
Soviets (Councils)
Princeton subject headings:
Soviet Union--Administrative and political divisions.
Soviet Union--History--Revolution, 1917-1921.
Soviets (Councils)