Hamel, D., McGregor, M., & States. Forest Service. Northern Region. State & Private Forestry, U. (1976). Evaluation of mountain pine beetle infestations, Lap, Cool, Lang, and Caribou Creek drainages, Yaak Ranger District, Kootenai National Forest, Montana. : Missoula, MT. : Forest Environmental Protection, USDA, Forest Service, Northern Region, State & Private Forestry.