TY JOUR TI EFFECTS OF THINING ON THE MACROSTRUCTURE AND WOOD DENSITY OF SPRUCE AND PINE KW JO Forestry Engineering Journal AU Zaytsev, D.A. AU Danilov, D.A. AU Beliaeva, N.V. PY 2019 IS 8 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov