TY CONF TI PROBLEMS OF RECYCLING WOOD WASTE IN THE FORM OF BIRCH BARK KW wood waste KW birch bark KW plywood production KW composite material KW recycling JO ENERGY-SAVING AND ENVIRONMENTALLY FRIENDLY TECHNOLOGIES IN THE FORESTRY INDUSTRY AU Chernykh, A.S. AU Rublev, I.Y. PY 2024 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov