TY JOUR TI STATISTICAL ANALYSIS OF HEAVY METALS IN WATER BY THE EXAMPLE OF THE RIVER MIASS, CHELYABINSK KW heavy metals KW surface waters pollu-tion KW the river of Miass KW factorial analysis JO Bulletin of KSAU AU Verkhoturtseva, A.S. PY 2016 IS PB Krasnoyarsk State Agrarian University