1. a Forest Practices Branch
2. b J. Heineman Forestry Consulting , 2125 E. 5th Ave., Vancouver, BC, Canada , V5N 1M5
3. c Research Branch , BC Ministry of Forests and Range , PO Box 9513, Stn. Prov. Govt, Victoria, BC, Canada , V8W 9C2
4. d International Statistics and Research Corp. , PO Box 496, Brentwood Bay, BC, Canada , V8M 1R3