Columbia subject headings:
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Economic conditions.
Soviet Union--Economic policy--1928-1932.
Harvard subject headings:
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Economic policy--1928-1932.
Soviet Union--Economic policy--1933-1937.
Princeton subject headings:
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Economic policy--Five-year plan (1928-1932)
Soviet Union--Economic policy--Five-year plan, Second.