Não informado. Annual report of the forest insect and disease survey. Department of Forestry and Rural Development, Forest Entomology and Pathology Branch.
Chicago-referens (17:e uppl.)Não informado. Annual Report of the Forest Insect and Disease Survey. Ottawa: Department of Forestry and Rural Development, Forest Entomology and Pathology Branch.
MLA-referens (8:e uppl.)Não informado. Annual Report of the Forest Insect and Disease Survey. Department of Forestry and Rural Development, Forest Entomology and Pathology Branch.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.