Columbia subject headings:
Agriculture--Economic aspects--Soviet Union--History--20th century.
Collective farms--Soviet Union--History--20th century.
Collectivization of agriculture--Soviet Union--History--20th century.
Harvard subject headings:
Agriculture--Economic aspects--Soviet Union--History--20th century.
Collective farms--Soviet Union--History--20th century.
Collectivization of agriculture--Soviet Union--History--20th century.
Princeton subject headings:
Agriculture--Economic aspects--Soviet Union--History--20th century.
Collective farms--Soviet Union--History--20th century.
Collectivization of agriculture--Soviet Union--History--20th century.