TY JOUR TI CONTENT OF HEAVY METALS IN WATER AND BOTTOM SEDIMENTS OF FRESHWATER RESERVOIRS IN CHELYABINSK REGION KW JO Agrarian Bulletin of the AU Gribovskiy, Y.G. AU Nohrin, D.Y. AU Davydova, N.A. AU Kolesnik, E.A. PY 2018 IS 176 PB Ural State Agrarian University