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Yermagambet Bolat Toleukhanuly; Kazankapova Maira Kuttybaevna; Kassenova Zhanar Muratbekovna; Nauryzbaeva Asemay Turlangyzy. OBTAINING DERIVATIVES OF HUMIC SUBSTANCES FROM OXIDIZED COAL AND STUDY OF PHYSICO-CHEMICAL AND ADSORPTION PROPERTIES. SCT 2020, 57-64.