TY JOUR TI THE ARGUN RIVER BASIN BIRCH FOREST DEGRADATION AS THE CLIMATIC CHANGE INDICATOR KW East Transbaikalia KW the Argun River KW climatic change KW birch plantations JO Bulletin of KSAU AU Vakhnina, I.L. AU Malykh, O.F. PY 2013 IS PB Krasnoyarsk State Agrarian University