- Hoffman, J., A. Keysor, A. Knapr, and J. Weatherby. 1987. Forest insect and disease conditions, Intermountain Region. United States Department of Agriculture, Forest Service, Intermountain Region, Ogden, Utah, Forest Pest Management Report. 22 p.
- Hoffman, J., A. Keysor, A. Knapr, and J. Weatherby. 1988. Forest insect and disease conditions, Intermountain Region, 1987. United States Department of Agriculture, Forest Service, Forest Pest Management, Intermountain Region, Ogden, Utah. 20 p.
- Knapr, A. K. 1985. Forest insect and disease conditions: Intermountain Region 1984. United States Department of Agriculture, Forest Service, State and Private Forestry, Intermountain Region, Ogden, Utah. 23 p.