TY JOUR TI Conditions of application non-destructive quality assessment of sawn timber KW nondestructive testing KW Sawn timber KW cut KW quality defects of wood JO Actual directions of scientific researches of the XXI century: theory and practice AU Koval, V.. AU Mazurchuk, S.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov