Columbia subject headings:
Harvard subject headings:
Peasants--Soviet Union--History--20th century.
Soviet Union--History--Revolution, 1917-1921.
Working class--Soviet Union--History--20th century.
Princeton subject headings:
Peasants--Soviet Union--History--20th century.
Soviet Union--History--Revolution, 1917-1921.
Working class--Soviet Union--History--20th century.