1. Canadian Wildlife ServiceEnvironment and Climate Change Canada Delta British Columbia Canada
2. Canadian Wildlife ServiceEnvironment and Climate Change CanadaNational Wildlife Research Centre Ottawa Ontario Canada
3. Canadian Forest ServiceNatural Resources CanadaGreat Lakes Forestry Centre Marie Ontario Canada
4. National Council for Air and Stream Improvement Inc. Montreal QC Canada
5. Faculty of Forestry and Environmental ManagementUniversity of New Brunswick Fredericton New Brunswick Canada