Apendiyev T. А., and Z. M. . Assylbekova. “The Main Results of the All-Union Census of the Population of the South of Kazakhstan (1926-1939) in Archival Materials”. Bulletin of L.N. Gumilyov Eurasian National University. Historical Sciences. Philosophy. Religious Studies, vol. 142, no. 1, Mar. 2023, pp. 8-25, doi:10.32523/2616-7255-2023-142-1-8-25.