TY JOUR TI CONTENT OF HEAVY METALS IN TISSUES AND ORGANS OF DIFFERENT FISH SPECIES OF THE VOLGOGRAD RESERVOIR KW bream KW walleye pike KW perch KW roach KW heavy metals KW accumulation JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Zubkova, V.. AU Bolotov, V.. AU Rozumnaya, L.. PY 2016 IS PB Astrakhan State Technical University