BAIZHIYENOVA, K.T. Documents and literature of health protection funds as historical source. Bulletin of the Karaganda university History. Philosophy series, [S. l.], v. 97, n. 1, p. 51–56, 2020. DOI: 10.31489/2020hph1/51-56. Disponível em: https://ejh.buketov.edu.kz/history-philosophy-vestnik/article/view/196. Acesso em: 27 sep. 2026.