Olga Naymushina, Marina Kolpakova, Olga Gaskova. "CHEMICAL SPECIATION OF HEAVY METALS IN PEAT BOG, KOKCHETAV MOUNTAIN GROUP, NORTH KAZAKHSTAN." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Water Resources. Forest, Marine and Ocean Ecosystems (2017): 113-120. https://doi.org/10.5593/sgem2017/31/s12.015