TY JOUR TI THE QUESTION OF IMPROVING THE DEVELOPMENT DATA-BASE OF FOREST CONCESSION AREAS WOODLAND KW Modeling KW аnalysis KW vehicles KW costs JO Voronezh Scientific-Technical Bulletin AU Ivannikov, V.A. AU Sushkov, S.I. PY 2015 IS 4 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov