Columbia subject headings:
Soviet Union--History--Allied intervention, 1918-1920.
Ural Mountains Region (Russia)--History.
Harvard subject headings:
Soviet Union--History--Allied intervention, 1918-1920.
Ural Mountains Region (Russia)--History.
Princeton subject headings:
Soviet Union--History--Allied intervention, 1918-1920.
Ural Mountains Region (Russia)--History.