TY JOUR TI ANALYSIS OF THE CHARACTERISTIC OF THE PINE UNDERGROWTH AFTER GROUND FIRE IN THE LENINGRAD REGION KW JO Forestry Engineering Journal AU Gusev, D.V. AU Danilov, D.A. AU Beliaeva, N.V. PY 2018 IS 8 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov