Columbia subject headings:
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Economic policy--1917-1928.
Soviet Union--Politics and government--1917-1936.
Harvard subject headings:
Mixed economy--Soviet Union.
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Economic policy--1917-1928.
Princeton subject headings:
Mixed economy--Soviet Union.
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Economic policy--1917-1928.