- Safranyik, L., and R. Garbutt. 1993. Spruce beetle. Natural Resources Canada, Canadian Forestry Service, Pacific and Yukon Region (Victoria, B.C.), Forest Pest Leaflet 13.
- Garbutt, R. 1992. Western balsam bark beetle. Forestry Canada, Forest Pest Leaflet 64. 4 pp.
- Garbutt, R. 1996. Spruce beetle in the boreal cordillera and taige plain ecozones of the Yukon Territory. Canadian Forest Service, Pacific Forestry Centre (Victoria, BC), Pest Report 96-3. 3 pp.