MLA

Hard, John S, and United States. Forest Service. Northern Region. State & Private Forestry. A Reevaluation of 1978 Aerial Bacillus Thuringiensis Berliner (bt) Applications for Cankerworm Control In Siberian Elm Shelterbelts. : Missoula, MT. : Forest Insect & Disease Management, USDA, Forest Service, Northern Region, State & Private Forestry, 1979.