Author
Canadian Forestry Service
Canada. Department of Forestry and Rural Development
1
Canada. Dept. of Agriculture. Forest Biology Division
1
Canada. Dept. of Forestry
1
Canada. Forest Entomology and Pathology Branch
1
Canada. Forestry Branch
1
Canadian Forestry Association
1
Canadian Institute of Forestry
1
Canadian Society of Forest Engineers
1
Forest Insect and Disease Survey (Canada)
1
National Research Council of Canada
1