Columbia subject headings:
Agriculture and state--Soviet Union--History--20th century.
Communism--Soviet Union--History--20th century.
Lenin, Vladimir Ilʹich, 1870-1924.
Soviet Union--Economic policy--1917-1928.
Harvard subject headings:
Agriculture and state--Soviet Union--History--20th century.
Communism--Soviet Union--History
Lenin, Vladimir Ilʹich, 1870-1924
Mixed economy--Soviet Union--History--20th century.
Soviet Union--Economic policy--1917-1928.
Princeton subject headings:
Agriculture and state--Soviet Union--History--20th century.
Communism--Soviet Union--History--20th century.
Lenin, Vladimir Ilʹich, 1870-1924.
Soviet Union--Economic policy--1917-1928.