TY JOUR TI Performance analysis skidders in the middle taiga Komi Republic KW skidders KW productivity KW timing KW assortment KW plot JO Actual directions of scientific researches of the XXI century: theory and practice AU Svoykin, V.F. AU Molchanova, A.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov