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12 Canadian Forestry Service 6 Canada. Environment Canada 4 Canada/United States Spruce Budworms Program 4 Forest Pest Management Institute (Canada) 4 Smith, T. D. 3 Laurentian Forestry Centre more ... 3 Maine. Bureau of Forestry 3 Maritimes Forest Research Centre 3 Northeastern Forest Experiment Station (Radnor, Pa.) 3 Nova Scotia. Dept. of Lands and Forests 2 British Columbia. Ministry of Forests 2 Canadian Forest Service 2 Canadian Forestry Service annual forest pest control forum Hull, P.Q.) 2 Canadian Forestry Service annual forest pest control forum Ottawa, Ontario) 2 Carter, Nelson E. 2 Georgeson, E. 2 IEA Coal Research 2 Kettela, E. G. 2 New Brunswick Committee for Environmental Monitoring of Forest Insect Control Operations (EMOFICO) 2 New Brunswick Department of Natural Resources and Energy 2 Newfoundland Forest Research Centre 2 Nova Scotia Department of Lands and Forests. Entomological Services 2 Richardson, J. Smith, C. C. 2 United States. Cooperative State Research Service 2 United States. Forest Service 2 University of New Brunswick 1 Abbott, Jacob Bates 1 Ackerman, Gordon C., 1950- 1 Alfaro, René I see all ... less ...
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