Columbia subject headings:
Economics--Research--Soviet Union--History.
Marxian economics--History.
Soviet Union--Economic policy--1917-1928.
Harvard subject headings:
Economics--Research--Soviet Union--History.
Marxian economics--History.
Soviet Union--Economic policy--1917-1928.
Princeton subject headings:
Economics--Research--Soviet Union--History.
Marxian economics--History.
Soviet Union--Economic policy--1917-1928.