Mussagaliyeva A, Mussabekova R. Poles in the Development of Virgin and Fallow Lands in Northern Kazakhstan. HPH [Internet]. 2025 Dec. 30 [cited 2026 Sep. 9];12030(4):101-12. Available from: https://history-philosophy-vestnik.buketov.edu.kz/history-philosophy-vestnik/article/view/1853