Columbia subject headings:
Harvard subject headings:
Collectivization of agriculture--Soviet Union--History
Collectivization of agriculture--Soviet Union--History--Sources.
Concentration camps--Soviet Union--History--Sources.
Crimes against humanity--History--20th century--Sources.
Forced labor--Soviet Union--History
Forced labor--Soviet Union--History--Sources.
Forced migration--Soviet Union--History.
Soviet Union--Economic conditions--1917-1945.
Soviet Union--History--1925-1953--Sources.
Soviet Union--Politics and government--1917-1936.
Princeton subject headings:
Collectivization of agriculture--Soviet Union--History.
Forced labor--Soviet Union--History.
Forced migration--Soviet Union--History.
Soviet Union--Economic conditions--1917-1945.
Soviet Union--Politics and government--1917-1936.