TY JOUR TI OBJECTIVE LAWS OF SPATIAL DISTRIBUTION OF MICROCELLS IN THE SOILS OF TUVA KW soil cover KW heavy metals KW mobile forms KW factor of anthropogenic accumulation KW MPC KW Tuva JO Bulletin of KSAU AU Zhulanova, V.N. AU Belek, A.N. PY 2012 IS PB Krasnoyarsk State Agrarian University