Columbia subject headings:
Ethnology--Soviet Union--History--Mathematical models.
Land tenure--Soviet Union--History--Mathematical models.
Peasants--Soviet Union--History--Mathematical models.
Soviet Union--History--Mathematical models.
Soviet Union--Social conditions--Mathematical models.
Harvard subject headings:
Ethnology--Soviet Union--History--Mathematical models.
Land tenure--Soviet Union--History--Mathematical models.
Peasants--Soviet Union--History--Mathematical models.
Soviet Union--History--Mathematical models.
Soviet Union--Social conditions--Mathematical models.
Princeton subject headings:
Ethnology--Soviet Union--History--Mathematical models.
Land tenure--Soviet Union--History--Mathematical models.
Peasants--Soviet Union--History--Mathematical models.
Soviet Union--History--Mathematical models.
Soviet Union--Social conditions--Mathematical models.