tazitdinova, rumiya1985, & Бейсенова, Р. (2022). ECOLOGICAL ASSESSMENT OF THE QUALITY OF FRESH WATER SOURCES OF RURAL AREAS OF PAVLODAR REGION. Известия НАН РК. Серия химии и технологии, (2), 53–62. https://doi.org/10.32014/2022.2518-1491.102