BAIMOLDA D; LENNIK S; DIDARBEK P. STUDY OF CHEMICAL ELEMENTS IN THE COMPOSITION OF THE SHUBARKOL COAL BY X-RAY FLUORESCENCE METHOD. Foundations and Trends in Modern Learning, [S. l.], n. 11, 2025. Disponível em: https://ojs.publisher.agency/index.php/FTML/article/view/7217. Acesso em: 20 may. 2026.