Columbia subject headings:
Social sciences--Bibliography.
Soviet Union--Economic conditions--Bibliography.
Soviet Union--History--Revolution, 1917-1921--Bibliography.
Harvard subject headings:
Social sciences--Bibliography
Soviet Union--Economic conditions--1917-1945--Bibliography.
Soviet Union--History--Revolution, 1917-1921--Bibliography.
Princeton subject headings:
Social sciences--Bibliography.
Soviet Union--Economic conditions--Bibliography.
Soviet Union--History--Revolution, 1917-1921--Bibliography.