1. a Division of Forest Management , Taiwan Forestry Research Institute , 53 Nan-Hai Road, Taipei , 10066 , Taiwan
2. b Research Branch , BC Ministry of Forests and Range , PO Box 9519, Station Provincial Government, Victoria , BC , Canada , V8W 9C2
3. c Division of Silviculture , Taiwan Forestry Research Institute , 53 Nan-Hai Road, Taipei , Taiwan , 10066
4. d Formerly of Research Branch, BC Ministry of Forests and Range , PO Box 9519, Station Provincial Government, Victoria , BC , Canada , V8W 9C2