G.Z. Iskakova, A.S. Yskak, N.A.Tasilov и R.ZH. Mrzabayeva 2023. EMPLOYEES OF POSTAL AND TELEGRAPH INSTITUTIONS OF THE SEMIRECHENSK REGION (SECOND HALF OF THE 19TH - FIRST HALF OF THE 20TH CENTURY). «Вестник НАН РК». 406, 6 (дек. 2023), 142–152. DOI:https://doi.org/10.32014/2023.2518-1467.623.