Authors
Chang-Yi Xie
British Columbia Ministry of Forests, Research Branch, P.O. Box 9519,, Victoria, Canada
Y.-B. Fu
Plant Gene Resources of Canada, AAFC Saskatoon Research Centre, 107 Science Place,, Saskatoon, Canada
A. D. Yanchuk
British Columbia Ministry of Forests, Research Branch, P.O. Box 9519,, Victoria, Canada