Canadian Forest Service Publications
Two-year-cycle spruce budworm in the Ft. St. James and Mackenzie Forest Districts. 1993. Humphreys, N.; Ferris, R.L. Forestry Canada, Pacific Forestry Centre, Victoria, BC. FIDS Pest Report 93-16.
Available from: Pacific Forestry Centre
Catalog ID: 3477
Series: FIDS Report (CFS)