Columbia subject headings:
Harvard subject headings:
Amurskai︠a︡ oblastʹ (Russia)--Politics and government--1917-
Soviet Union--History--Revolution, 1917-1921.
Soviets (Councils)--Russia (Federation)--Amurskai︠a︡ oblastʹ--History.
Princeton subject headings:
Amurskai︠a︡ oblastʹ (Russia)--History.