R. Gabdarxakovna Shamsutdinova, E. Mikhailovna Shuvalova, and A. MarselevnaI Mamutdinova, “History teaching in the soviet school of the 1920s - 1930s: (for example, schools in the city of kazan)”, RSAN, vol. 5, no. 20, pp. 72–79, Dec. 2017.