Ключевые слова: autumn, bark, beetle, beetlekillpine, blade, bulldozer, cut, cutting, day, deforestation, disease, dried, dry, earthmove, ecology, environmental, fall, fell, felled, felling, firewood, forest, forestry, harvesting, insects, ips, landscape, logging, logs, lumber, lumbering, machine, operations, pile, pine, problem, procurement, russia, russian, sanitary, sawing, sunny, timber, trac, tractor, tree, typographus, view, wood, work,