USSR 1922-1972: anniversary statistical yearbook]. Moscow, Publishing house “Statistics”, 1972. 848 p. (In Russian)
18.Nikonov A. A. Spiral' mnogovekovoy dramy: agrarnaya nauka i politika Rossii (XVIII-XX vv.) [The spiral
of centuries-old drama: agrarian science and politics of Russia (18-50th centuries)]. Moscow, Publishing House “Encyclopedia of Russian villages”, 1995. 574 p. (In Russian)
19.Rossiyskiy statisticheskiy yezhegodnik 1995: statisticheskiy sbornik [Russian Statistical Yearbook 1995: statistical compilation]. Moscow, 1995. 976 p. (In Russian)
20.Stolyarov K. A. Palachi i zhertvy [Executioners and Victims]. Moscow, OLMA Media Group, 1997. 363 p. (InRussian)