Kaliaskarova, G., & Mussabalina, G. (2025). Development of Navigation and Merchant Trade on the Irtysh River in the Second half of the XIX century: Economic and Social Aspects of the Cities of the Irtysh Region. Bulletin of the Karaganda University History. Philosophy Series, 11830(2), 70–78. https://doi.org/10.31489/2025hph2/70-78