Bennett, D. D, and United States. Forest Service. Northern Region. State & Private Forestry. Pilot Survey to Measure Annual Mortality Caused by the Mountain Pine Beetle In Lodgepole Pine On the Beaverhead, Gallatin and Flathead National Forests In 1978. : Missoula, MT. : Forest Insect & Disease Management, USDA, Forest Service, Northern Region, State & Private Forestry, 1979.