TY JOUR TI ABOUT THE INFLUENCE OF TECTONIC CENTERS ON THE STRUCTURE AND PROPERTIES OF PINE AND FIR TIMBER IN ARKHANGELSK REGION KW tectonic center KW annual ring width KW proportion of late wood KW thickness of the cell wall KW fir KW pine JO Bulletin of KSAU AU Belyaev, V.V. AU Neverov, N.A. PY 2016 IS PB Krasnoyarsk State Agrarian University