TY JOUR TI ANALYSIS OF THE EFFICIENCY OF TRANSPORTATION OF PROCESSED TIMBER MATERIALS BY VARIOUS TYPES OF TRANSPORT AT THE CURRENT STAGE OF DEVELOPMENT OF THE RUSSIAN FEDERATION KW efficiency KW transport for hauling timber KW road and rail transport KW water and pipeline transport KW aerostat KW airship KW helicopter KW helicopter JO Voronezh Scientific-Technical Bulletin AU Nikonov, V.O. AU Posmetev, V.I. PY 2020 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov