TY JOUR TI The voluntary forest certification requirements for harvest area design and cutting area operating KW подготовительные работы лесозаготовок KW лесная сертификация KW ключевые биотопы KW отвод лесосек. JO Actual directions of scientific researches of the XXI century: theory and practice AU Pavlova, D.. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov