APA

James, R., States. Forest Health Protection, U., & States. Forest Service. Northern Region, U. (2000). Effects of topical application of the biological control agent Biotrek on production of bareroot Douglas-fir and western white pine seedlings, USDA Forest Service Nursery, Coeur d'Alene, Idaho. : Missoula, MT : U.S. Dept. of Agriculture, Forest Service, Northern Region.