Hamel, D. R., and R. D. Oakes. 1977b. Evaluation of mountain pine beetle infestation, Lap, Cool, and Caribou drainages, Yaak District, Kootenai National Forest, 1976. United States Department of Agriculture, Northern Region, Forest Service, State and Private Forestry, Missoula, Montana, Report 77-8. 7 p.