- Ammon, V. D. 1966. The importance of the small oak barkbeetle, Pseudopityophthorus minutissimus (Zimm.), as a vector of the oak wilt fungus, Ceratocystis fagacearum (Bretz) Hunt. Unpublished thesis, University of Missouri, Columbia.
- Ammon, G., and K. Ryan. 1991. Insect infestation of fire-injured trees in the Greater Yellowstone area. United States Department of Agriculture, Forest Service, Intermountain Research Station (Ogden, UT), Research Note INT-398.
- Ammon, G., and K. Ryan. 1994. Using pheromones to protect heatinjured lodgepole pine from mountain pine beetle infestation. United States Department of Agriculture, Forest Service, Intermountain Research Station (Ogden, UT), Research Note INT-419.
- Ammon, G., R. Thier, J. Weatherby, L. Rasmussen, and A. Munson. 1991. Optimum dosage of verbenone to reduce infestation of mountain pine beetle in lodgepole pine stands of central Idaho. United States Department of Agriculture, Forest Service, Intermountain Research Station (Ogden, UT), Research Paper INT-446.
- Rasmussen, L., G. Ammon, J. Vandygriff, R. Oakes, A. Munson, and K. Gibson. 1996. Bark beetle and wood borer infestation in the Greater Yellowstone area during four postfire years. United States Department of Agriculture, Forest Service, Intermountain Research Station (Ogden, UT), Research Paper INT-RP-487. 10 pp.