TY JOUR TI FLUCTUATING ASYMMETRY OF THE FLAT-LEAVED BIRCH LEAVES AS AN ENVIRONMENTAL INDICATOR OF A SETTLEMENT TERRITORY KW birch KW leaf KW lamina KW area KW asymmetry KW indication KW city KW natural forest KW correlation JO Bulletin of KSAU AU Nizkiy, S.. AU Sergeeva, A.S. PY 2012 IS 0 PB Krasnoyarsk State Agrarian University