YBYRAJHAN, M.Y.; USKEMBAEV , K.S. The situation of workers of the Central Kazakhstan mining and metallurgical industry late nineteenth and early twentieth centuries. Bulletin of the Karaganda university History. Philosophy series, [S. l.], v. 86, n. 2, p. 81–89, 2017. Disponível em: https://ejh.buketov.edu.kz/history-philosophy-vestnik/article/view/217. Acesso em: 27 sep. 2026.