TY JOUR TI THE RESEARCH OF THE MATERIAL COST SHARE IN THE TOTAL PRODUCTION COSTS (ON THE EXAMPLE OF BREST AND KALININGRAD REGIONS) KW material cost share KW material resource use level KW reserves of material resource economy KW cluster JO Bulletin of KSAU AU Klimyuk, V.V. PY 2014 IS PB Krasnoyarsk State Agrarian University