Mironov, Boris (1991). "The Development of Literacy in Russia and the USSR from the Tenth to the Twentieth Centuries". History of Education Quarterly. 31 (2): 247. doi:10.2307/368437. JSTOR368437. S2CID144460404.
Mironov, Boris (1991). "The Development of Literacy in Russia and the USSR from the Tenth to the Twentieth Centuries". History of Education Quarterly. 31 (2): 247. doi:10.2307/368437. JSTOR368437. S2CID144460404.
Mironov, Boris (1991). "The Development of Literacy in Russia and the USSR from the Tenth to the Twentieth Centuries". History of Education Quarterly. 31 (2): 247. doi:10.2307/368437. JSTOR368437. S2CID144460404.